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2,6-Bis(tert-butyl­dimethyl­silyl­oxy)-9-oxabicyclo­[3.3.1]nonane-3,7-diol, C20H42O5Si2, (I), and 4,8-bis­(tert-butyl­dimethyl­silyl­oxy)-2,6-dioxatricyclo­[3.3.13,7]decane-1,3-diol, C20H40O6Si2, (II), form layered structures that differ in the way the mol­ecules are connected within each layer. The endocyclic O atom common to both structures plays an active role in the hydrogen-bonding network, whereas the second oxygen bridge in (II) does not participate in any inter­action. This work reports the first structural analysis of two bis­(tert-butyl­dimethyl­silyl­oxy)-substituted cyclic diol derivatives and provides insight into the influence of small changes in the mol­ecular structure on the supra­molecular aggregation. The unbalanced hydrogen-bond acceptor/donor ratio, greater in (II) than in (I), does not result in the inclusion of water mol­ecules in the structure.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270108038286/gd3255sup1.cif
Contains datablocks I, II, global

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S0108270108038286/gd3255Isup2.hkl
Contains datablock I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S0108270108038286/gd3255IIsup3.hkl
Contains datablock II

CCDC references: 718151; 718152

Comment top

Compounds (I) and (II) were synthesized as intermediate products within a project related to the synthesis of universal templates for the resolution of racemic mixtures of secondary alcohols (Carrasco et al., 2002; López-Rodríguez & Foces-Foces, 2007). A search of the Cambridge Structural Database (Allen 2002; Version 5.29, January 2008 update) for bicyclic ether-bridged derivatives with tert-butyldimethylsilyloxy side substituents (OTBS hereinafter) gave just two oxa-bicyclic structures [refcodes WAXXIC (Takahashi et al., 2000) and KEKPIA (Paquette & Zhang, 2006)] with only one OTBS side substituent and different relative disposition of the two hydroxy groups. In the latter, apart from a bulky methoxybenzyloxy substituent, the OTBS substituent displays a quasi-axial disposition, in contrast to the equatorial configuration in the former and in the present compounds (Fig. 1). Furthermore, only one dioxatricycle derivative has been reported (OXADMN; 1,3,5,7-tetramethoxy -2,6-dioxatricyclo[3.3.13,7]decane; Kanters & Hulscher, 1968). Considering these facts, the structural characterization of compounds (I) and (II) was undertaken, and the effect of including a second oxygen bridge on the molecular structure, the conformational changes and the associated packing features were analysed.

Both compounds crystallize with two independent molecules in the asymmetric unit. The superposition of the two molecules is shown in Fig. 2. The major discrepancies between the two compounds concern the orientation of the hydroxy H atom and the substituents at the Si atoms with respect to the central core (Tables 1 and 3). The C atoms of the methyl and tert-butyl groups at Si1 and Si2 (atoms C11–C14 and C17–C20, respectively, for molecules A and B) adopt the anticlinal and antiperiplanar conformations in (I), while in (II) the synclinal conformation is also observed. The main differences in the core between (I) and (II) are due to the inclusion of an additional ether bridge between C3 and C7 [atom O6 in Fig. 1(b)] that results in the shortening of the C3···C7 distance [2.413 (2) and 2.420 (2) Å in (IIA) and (IIB) versus 3.133 (11) Å in WAXXIC and 3.187 (4) and 3.182 (4) Å in (IA) and (IB), respectively] followed by an increase in the puckering of the O1/C1–C5 and O1/C1/C5–C8 rings of the core [with total puckering amplitudes of 0.625 (1) versus 0.557 (6) Å on average in (II) and (I), respectively (Cremer & Pople, 1975)]. Significant differences in the C—OH distances and in the C—C—C angles around atoms C3 and C7 have also been observed (Tables 1 and 3).

The crystal structures are characterized by two-dimensional hydrogen-bonding networks, although the supramolecular aggregations differ from each other. In (I), each independent molecule is engaged in similar hydrogen-bond interactions, forming sheets of only molecules A (Fig. 3a) or molecules B parallel to the bc plane. One hydoxy group, O2, acts as a donor and an acceptor of hydrogen bonds, while the other, O3, acts as a donor only. The former links molecules (hydroxy-to-ether contacts) along the c axis into C(6) chains (Bernstein et al., 1995) that are connected through hydroxy-to-hydroxy contacts to result in sheets of R44(16) and R44(28) edge-fused rings (Table 2 and Fig. 3a).

In contrast to this situation, in (II), the two independent molecules and their symmetry-related molecules are associated into one layer through different hydrogen bonds (Table 4 and Fig. 3b). The four hydroxy groups are in different environments. Whereas both hydroxy groups in molecule B act as hydrogen-bond donors to O atoms, in molecule A atom O2 acts simultaneously as a donor and an acceptor, and the hydroxy atom O3 seems to be not sterically accessible and does not participate in any hydrogen-bonding interactions either as a donor or as an acceptor. Similar C(6) chains to that in (I) but involving alternately molecules A and B are observed along the c axis. The O3/H3O group of molecule B connects these chains into sheets of R44(24) and R88(40) edge-fused rings (Table 4 and Fig. 3b). The other O6 bridge, in both molecules A and B, is not engaged in any hydrogen-bond contact. The crystal structures are built up of sheets of molecules A or molecules B that stack alternately by translation in the [100] direction in (I) (Fig. 4a) while, in (II), the single sheet (molecules A and B) extends by translation along [100] (Fig. 4b).

The volumes per atom in (I) and (II) differ with a value of 23.2 Å3 per non-H atom for (I) and 21.4 Å3 for (II), reflecting the differences in the hydrogen-bonding motifs.

Related literature top

For related literature, see: Allen (2002); Bernstein et al. (1995); Carrasco et al. (2002); Cremer & Pople (1975); Kanters & Hulscher (1968); López-Rodríguez & Foces-Foces (2007); Paquette & Zhang (2006); Takahashi et al. (2000).

Experimental top

Compounds (I) and (II) were obtained as intermediate products in the synthesis of universal templates for the resolution of racemic mixtures of secondary alcohols (Carrasco et al., 2002). Both compounds were crystallized from a carbon tetrachloride/isopropyl ether mixture (50%). No structural phase transition was detected when cooling the samples from room temperature to 150 K.

Refinement top

All H atoms were located in difference Fourier maps and they were subsequently refined using a riding model [C—H = 0.98 (CH3), 0.99 (CH2) or 1.00 Å (CH), O—H = 0.84 Å and Uiso(H) = 1.2Ueq(C,O)].

Computing details top

For both compounds, data collection: COLLECT (Nonius, 2000); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: HKL DENZO and SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2003).

Figures top
[Figure 1] Fig. 1. The molecular structures of (a) compound (I) and (b) compound (II). Only molecule A is represented, showing displacement ellipsoids at the 30% probability level.
[Figure 2] Fig. 2. Superposition of the two independent molecules in (a) (I) and (b) (II), using atoms O1, C1 and C5 as common reference. Molecule A, in both compounds, is represented with filled bonds.
[Figure 3] Fig. 3. Comparison of the supramolecular aggregation of (a) molecules A in (I) and (b) molecules A and B in (II). H atoms not involved in the hydrogen-bond interactions have been omitted for clarity.
[Figure 4] Fig. 4. Packing diagrams. (a) Compound (I), showing the alternation of sheets formed by molecules B, A and B, respectively. (b) Compound (II), showing two single sheets related by translation. H atoms not involved in the hydrogen-bond interactions have been omitted for clarity.
(I) 2,6-Bis(tert-butyldimethylsilyloxy)-9-oxabicyclo[3.3.1]nonane-3,7-diol top
Crystal data top
C20H42O5Si2Z = 8
Mr = 418.72F(000) = 1840
Monoclinic, P21/cDx = 1.108 Mg m3
Hall symbol: -P 2ybcMo Kα radiation, λ = 0.71070 Å
a = 27.7623 (6) Åθ = 1.6–25.0°
b = 14.3663 (3) ŵ = 0.17 mm1
c = 12.6076 (2) ÅT = 150 K
β = 93.491 (1)°Block, colourless
V = 5019.10 (17) Å30.60 × 0.37 × 0.20 mm
Data collection top
Nonius KappaCCD
diffractometer
10858 independent reflections
Radiation source: fine-focus sealed tube9400 reflections with I > 2σ(I)
Horizontally mounted graphite crystal monochromatorRint = 0.059
Detector resolution: 9 pixels mm-1θmax = 27.0°, θmin = 1.5°
ϕ and ω scansh = 3535
Absorption correction: multi-scan
(PLATON; Spek, 2003)
k = 1818
Tmin = 0.907, Tmax = 0.968l = 1516
33413 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.063Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.157H-atom parameters constrained
S = 1.10 w = 1/[σ2(Fo2) + (0.0367P)2 + 8.9514P]
where P = (Fo2 + 2Fc2)/3
10858 reflections(Δ/σ)max = 0.008
492 parametersΔρmax = 1.03 e Å3
0 restraintsΔρmin = 0.35 e Å3
Crystal data top
C20H42O5Si2V = 5019.10 (17) Å3
Mr = 418.72Z = 8
Monoclinic, P21/cMo Kα radiation
a = 27.7623 (6) ŵ = 0.17 mm1
b = 14.3663 (3) ÅT = 150 K
c = 12.6076 (2) Å0.60 × 0.37 × 0.20 mm
β = 93.491 (1)°
Data collection top
Nonius KappaCCD
diffractometer
10858 independent reflections
Absorption correction: multi-scan
(PLATON; Spek, 2003)
9400 reflections with I > 2σ(I)
Tmin = 0.907, Tmax = 0.968Rint = 0.059
33413 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0630 restraints
wR(F2) = 0.157H-atom parameters constrained
S = 1.10Δρmax = 1.03 e Å3
10858 reflectionsΔρmin = 0.35 e Å3
492 parameters
Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Si1A0.62322 (2)0.15526 (5)0.09256 (5)0.01736 (15)
Si2A0.34763 (3)0.07225 (5)0.38218 (6)0.02451 (17)
O1A0.51852 (6)0.18552 (12)0.38922 (13)0.0192 (4)
O2A0.50439 (7)0.32565 (11)0.11015 (13)0.0205 (4)
H2OA0.51470.31110.05110.025*
O3A0.43981 (7)0.04056 (13)0.26272 (16)0.0294 (4)
H3OA0.45010.07020.31690.035*
O4A0.56665 (6)0.15594 (12)0.12753 (14)0.0203 (4)
O5A0.39227 (7)0.12948 (13)0.32984 (15)0.0261 (4)
C1A0.54145 (9)0.13644 (16)0.30629 (19)0.0168 (5)
H1A0.57510.12160.33410.020*
C2A0.54543 (9)0.20279 (16)0.21221 (18)0.0150 (5)
H2A0.56700.25560.23570.018*
C3A0.49722 (9)0.24283 (16)0.17101 (19)0.0168 (5)
H3A0.47960.19560.12500.020*
C4A0.46592 (9)0.27055 (17)0.2616 (2)0.0200 (5)
H4A10.43190.27360.23350.024*
H4A20.47540.33380.28600.024*
C5A0.46904 (9)0.20507 (17)0.35777 (19)0.0186 (5)
H5A0.45550.23990.41790.022*
C6A0.44193 (9)0.11188 (17)0.3488 (2)0.0208 (5)
H6A0.44670.07890.41850.025*
C7A0.46139 (9)0.04997 (17)0.2636 (2)0.0214 (5)
H7A0.45360.07970.19290.026*
C8A0.51610 (9)0.04350 (17)0.2809 (2)0.0223 (5)
H8A10.52920.01710.21610.027*
H8A20.52400.00030.34000.027*
C9A0.62242 (11)0.1977 (2)0.0462 (2)0.0296 (6)
H9A10.65460.19030.07320.036*
H9A20.61340.26360.04840.036*
H9A30.59890.16170.09040.036*
C10A0.66117 (10)0.2319 (2)0.1827 (2)0.0323 (7)
H0A10.64840.29550.17900.039*
H0A20.69440.23170.16060.039*
H0A30.66060.20880.25570.039*
C11A0.64595 (11)0.0314 (2)0.0980 (2)0.0282 (6)
C12A0.64914 (13)0.0052 (2)0.2133 (3)0.0411 (8)
H21A0.66240.06850.21480.049*
H22A0.61680.00610.24060.049*
H23A0.67020.03560.25790.049*
C13A0.61177 (14)0.0303 (2)0.0290 (3)0.0453 (9)
H31A0.61030.00760.04440.054*
H32A0.57950.02830.05610.054*
H33A0.62370.09450.03110.054*
C14A0.69673 (12)0.0273 (3)0.0560 (3)0.0444 (8)
H41A0.69560.05090.01700.053*
H42A0.70820.03720.05730.053*
H43A0.71880.06580.10110.053*
C15A0.31010 (14)0.0192 (3)0.2708 (3)0.0504 (9)
H51A0.29940.06780.22010.060*
H52A0.28190.01100.29880.060*
H53A0.32920.02720.23480.060*
C16A0.37054 (11)0.0187 (2)0.4781 (3)0.0352 (7)
H61A0.34320.04960.50890.042*
H62A0.39100.01050.53480.042*
H63A0.38940.06460.44090.042*
C17A0.31292 (12)0.1623 (2)0.4541 (3)0.0401 (8)
C18A0.29603 (14)0.2400 (3)0.3748 (4)0.0599 (12)
H81A0.27680.21240.31510.072*
H82A0.32430.27120.34830.072*
H83A0.27640.28530.41100.072*
C19A0.34559 (15)0.2047 (3)0.5444 (3)0.0518 (10)
H91A0.32860.25610.57700.062*
H92A0.37530.22810.51560.062*
H93A0.35370.15700.59800.062*
C20A0.26874 (14)0.1188 (3)0.5028 (4)0.0638 (13)
H04A0.27950.07180.55540.077*
H05A0.24800.08950.44660.077*
H06A0.25060.16740.53750.077*
Si1B0.12197 (3)0.16793 (5)0.14236 (6)0.02083 (16)
Si2B0.15879 (3)0.11154 (5)0.40235 (6)0.02052 (16)
O1B0.01605 (6)0.21637 (12)0.42603 (13)0.0202 (4)
O2B0.00297 (7)0.33216 (12)0.13249 (13)0.0212 (4)
H2OB0.01110.31120.07400.025*
O3B0.06514 (7)0.01407 (13)0.33145 (19)0.0352 (5)
H3OB0.04460.05710.33370.042*
O4B0.06432 (6)0.16380 (12)0.16927 (14)0.0204 (4)
O5B0.11080 (6)0.16570 (13)0.36060 (15)0.0241 (4)
C1B0.03861 (9)0.15929 (17)0.34878 (19)0.0187 (5)
H1B0.07220.14610.37820.022*
C2B0.04312 (9)0.21779 (16)0.24851 (18)0.0164 (5)
H2B0.06500.27150.26680.020*
C3B0.00483 (9)0.25627 (16)0.20325 (18)0.0161 (5)
H3B0.02330.20590.16390.019*
C4B0.03499 (9)0.29478 (17)0.2909 (2)0.0199 (5)
H4B10.02340.35820.30960.024*
H4B20.06900.30010.26280.024*
C5B0.03343 (9)0.23616 (17)0.39119 (19)0.0192 (5)
H5B0.04700.27550.44770.023*
C6B0.06192 (9)0.14477 (18)0.3881 (2)0.0199 (5)
H6B0.06000.11820.46160.024*
C7B0.04169 (9)0.07275 (17)0.3143 (2)0.0219 (5)
H7B0.04880.09270.23900.026*
C8B0.01289 (9)0.06545 (17)0.3362 (2)0.0226 (5)
H8B10.02660.03100.27700.027*
H8B20.01960.02870.40190.027*
C9B0.13529 (12)0.2831 (2)0.0841 (3)0.0417 (8)
H9B10.16970.28680.07130.050*
H9B20.12710.33250.13360.050*
H9B30.11610.29090.01680.050*
C10B0.16158 (12)0.1523 (3)0.2656 (3)0.0552 (11)
H01B0.19530.14860.24720.066*
H02B0.15270.09470.30130.066*
H03B0.15760.20530.31320.066*
C11B0.12892 (11)0.0693 (2)0.0465 (3)0.0348 (7)
C12B0.1096 (2)0.0193 (3)0.0946 (5)0.0892 (19)
H21B0.08130.00450.13420.107*
H22B0.13470.04700.14280.107*
H23B0.10050.06360.03770.107*
C13B0.10054 (17)0.0907 (4)0.0586 (3)0.0699 (14)
H31B0.10240.03740.10660.084*
H32B0.11430.14580.09130.084*
H33B0.06670.10280.04510.084*
C14B0.18200 (13)0.0568 (3)0.0234 (3)0.0547 (10)
H41B0.18460.01160.03420.066*
H42B0.20010.03410.08740.066*
H43B0.19530.11660.00220.066*
C15B0.18606 (12)0.0388 (2)0.2926 (3)0.0385 (7)
H51B0.16250.00760.27190.046*
H52B0.19520.07850.23150.046*
H53B0.21480.00730.31650.046*
C16B0.14243 (11)0.0394 (2)0.5218 (2)0.0338 (7)
H61B0.12530.07790.57590.041*
H62B0.12160.01210.50200.041*
H63B0.17180.01430.55020.041*
C17B0.20159 (10)0.2073 (2)0.4374 (2)0.0295 (6)
C18B0.21000 (12)0.2745 (2)0.3432 (3)0.0414 (8)
H81B0.23110.32540.36340.050*
H82B0.22530.24090.28240.050*
H83B0.17900.30000.32380.050*
C19B0.18007 (15)0.2617 (2)0.5336 (3)0.0481 (9)
H91B0.20100.31470.54770.058*
H92B0.14790.28440.51860.058*
H93B0.17760.22090.59590.058*
C20B0.25025 (12)0.1653 (3)0.4643 (3)0.0511 (10)
H04B0.24600.12870.52970.061*
H05B0.26240.12500.40590.061*
H06B0.27340.21550.47440.061*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Si1A0.0164 (3)0.0219 (3)0.0140 (3)0.0020 (3)0.0025 (2)0.0010 (3)
Si2A0.0172 (4)0.0259 (4)0.0304 (4)0.0036 (3)0.0014 (3)0.0051 (3)
O1A0.0193 (9)0.0257 (9)0.0126 (8)0.0026 (7)0.0019 (7)0.0005 (7)
O2A0.0294 (10)0.0191 (8)0.0137 (8)0.0032 (7)0.0061 (7)0.0028 (7)
O3A0.0286 (11)0.0221 (9)0.0371 (12)0.0096 (8)0.0007 (9)0.0007 (8)
O4A0.0192 (9)0.0232 (9)0.0189 (9)0.0004 (7)0.0057 (7)0.0055 (7)
O5A0.0155 (9)0.0303 (10)0.0328 (11)0.0002 (8)0.0036 (8)0.0093 (8)
C1A0.0159 (12)0.0200 (11)0.0147 (12)0.0004 (9)0.0023 (9)0.0011 (9)
C2A0.0166 (12)0.0154 (10)0.0133 (11)0.0010 (9)0.0043 (9)0.0028 (9)
C3A0.0189 (12)0.0171 (11)0.0143 (12)0.0002 (9)0.0013 (9)0.0003 (9)
C4A0.0177 (12)0.0223 (12)0.0206 (13)0.0031 (10)0.0052 (10)0.0015 (10)
C5A0.0178 (12)0.0249 (12)0.0134 (11)0.0006 (10)0.0053 (9)0.0017 (9)
C6A0.0166 (12)0.0247 (12)0.0215 (13)0.0034 (10)0.0032 (10)0.0060 (10)
C7A0.0212 (13)0.0201 (12)0.0229 (13)0.0066 (10)0.0017 (10)0.0017 (10)
C8A0.0226 (14)0.0193 (12)0.0251 (14)0.0028 (10)0.0036 (11)0.0010 (10)
C9A0.0271 (15)0.0423 (16)0.0200 (14)0.0043 (12)0.0056 (11)0.0104 (12)
C10A0.0233 (15)0.0455 (17)0.0283 (15)0.0060 (13)0.0032 (12)0.0092 (13)
C11A0.0295 (15)0.0296 (14)0.0260 (14)0.0106 (12)0.0061 (12)0.0013 (11)
C12A0.049 (2)0.0359 (16)0.0392 (18)0.0178 (15)0.0098 (15)0.0138 (14)
C13A0.056 (2)0.0283 (15)0.052 (2)0.0053 (15)0.0089 (17)0.0135 (15)
C14A0.0365 (19)0.051 (2)0.047 (2)0.0206 (16)0.0159 (15)0.0070 (16)
C15A0.046 (2)0.056 (2)0.047 (2)0.0237 (18)0.0091 (17)0.0002 (17)
C16A0.0298 (16)0.0324 (15)0.0443 (19)0.0013 (13)0.0095 (14)0.0140 (13)
C17A0.0274 (16)0.0319 (15)0.063 (2)0.0012 (13)0.0192 (15)0.0022 (15)
C18A0.036 (2)0.0361 (19)0.108 (4)0.0087 (15)0.008 (2)0.013 (2)
C19A0.066 (3)0.0418 (19)0.051 (2)0.0066 (18)0.0246 (19)0.0104 (16)
C20A0.038 (2)0.050 (2)0.108 (4)0.0014 (17)0.042 (2)0.008 (2)
Si1B0.0150 (3)0.0296 (4)0.0184 (4)0.0034 (3)0.0051 (3)0.0043 (3)
Si2B0.0147 (3)0.0260 (4)0.0212 (4)0.0020 (3)0.0045 (3)0.0010 (3)
O1B0.0174 (9)0.0316 (9)0.0118 (8)0.0034 (7)0.0024 (7)0.0009 (7)
O2B0.0294 (10)0.0216 (9)0.0132 (9)0.0027 (7)0.0068 (7)0.0022 (7)
O3B0.0220 (10)0.0224 (10)0.0619 (15)0.0048 (8)0.0085 (10)0.0044 (10)
O4B0.0169 (9)0.0259 (9)0.0188 (9)0.0013 (7)0.0053 (7)0.0037 (7)
O5B0.0144 (9)0.0299 (10)0.0282 (10)0.0010 (7)0.0042 (7)0.0088 (8)
C1B0.0125 (11)0.0270 (13)0.0167 (12)0.0002 (10)0.0024 (9)0.0025 (10)
C2B0.0158 (12)0.0193 (11)0.0143 (11)0.0014 (9)0.0036 (9)0.0017 (9)
C3B0.0187 (12)0.0181 (11)0.0118 (11)0.0004 (9)0.0034 (9)0.0004 (9)
C4B0.0195 (13)0.0214 (12)0.0195 (13)0.0018 (10)0.0068 (10)0.0000 (10)
C5B0.0171 (12)0.0252 (12)0.0159 (12)0.0001 (10)0.0063 (9)0.0009 (10)
C6B0.0122 (12)0.0274 (13)0.0203 (13)0.0007 (10)0.0041 (9)0.0042 (10)
C7B0.0168 (13)0.0211 (12)0.0283 (14)0.0036 (10)0.0042 (10)0.0019 (10)
C8B0.0177 (13)0.0222 (12)0.0287 (14)0.0010 (10)0.0078 (10)0.0042 (10)
C9B0.0353 (18)0.0355 (16)0.056 (2)0.0050 (14)0.0167 (16)0.0088 (15)
C10B0.0240 (17)0.110 (3)0.0315 (18)0.0074 (19)0.0000 (14)0.011 (2)
C11B0.0317 (16)0.0335 (15)0.0409 (18)0.0118 (13)0.0164 (13)0.0039 (13)
C12B0.109 (4)0.0295 (19)0.138 (5)0.002 (2)0.076 (4)0.013 (2)
C13B0.063 (3)0.096 (3)0.050 (2)0.024 (2)0.008 (2)0.038 (2)
C14B0.039 (2)0.071 (3)0.056 (2)0.0195 (19)0.0197 (18)0.009 (2)
C15B0.0339 (17)0.0456 (18)0.0361 (17)0.0077 (14)0.0016 (14)0.0100 (14)
C16B0.0276 (16)0.0386 (16)0.0360 (17)0.0027 (13)0.0079 (13)0.0110 (13)
C17B0.0229 (14)0.0315 (14)0.0353 (16)0.0012 (12)0.0113 (12)0.0017 (12)
C18B0.0319 (17)0.0423 (18)0.050 (2)0.0095 (14)0.0036 (15)0.0087 (15)
C19B0.069 (3)0.0369 (17)0.041 (2)0.0019 (17)0.0196 (18)0.0091 (15)
C20B0.0276 (18)0.049 (2)0.080 (3)0.0054 (15)0.0286 (18)0.0035 (19)
Geometric parameters (Å, º) top
Si1A—O4A1.6570 (18)Si1B—O4B1.6570 (18)
Si1A—C9A1.851 (3)Si1B—C9B1.857 (3)
Si1A—C10A1.862 (3)Si1B—C10B1.862 (3)
Si1A—C11A1.888 (3)Si1B—C11B1.880 (3)
Si2A—O5A1.6574 (19)Si2B—O5B1.6564 (19)
Si2A—C15A1.860 (3)Si2B—C15B1.858 (3)
Si2A—C16A1.865 (3)Si2B—C16B1.861 (3)
Si2A—C17A1.879 (3)Si2B—C17B1.887 (3)
O1A—C5A1.434 (3)O1B—C5B1.445 (3)
O1A—C1A1.441 (3)O1B—C1B1.445 (3)
O2A—C3A1.436 (3)O2B—C3B1.434 (3)
O2A—H2OA0.8400O2B—H2OB0.8400
O3A—C7A1.432 (3)O3B—C7B1.429 (3)
O3A—H3OA0.8400O3B—H3OB0.8400
O4A—C2A1.420 (3)O4B—C2B1.420 (3)
O5A—C6A1.408 (3)O5B—C6B1.412 (3)
C1A—C2A1.531 (3)C1B—C8B1.529 (3)
C1A—C8A1.534 (3)C1B—C2B1.530 (3)
C1A—H1A1.0000C1B—H1B1.0000
C2A—C3A1.519 (3)C2B—C3B1.520 (3)
C2A—H2A1.0000C2B—H2B1.0000
C3A—C4A1.530 (3)C3B—C4B1.530 (3)
C3A—H3A1.0000C3B—H3B1.0000
C4A—C5A1.532 (3)C4B—C5B1.517 (3)
C4A—H4A10.9900C4B—H4B10.9900
C4A—H4A20.9900C4B—H4B20.9900
C5A—C6A1.536 (3)C5B—C6B1.532 (3)
C5A—H5A1.0000C5B—H5B1.0000
C6A—C7A1.519 (4)C6B—C7B1.522 (4)
C6A—H6A1.0000C6B—H6B1.0000
C7A—C8A1.524 (4)C7B—C8B1.527 (4)
C7A—H7A1.0000C7B—H7B1.0000
C8A—H8A10.9900C8B—H8B10.9900
C8A—H8A20.9900C8B—H8B20.9900
C9A—H9A10.9800C9B—H9B10.9800
C9A—H9A20.9800C9B—H9B20.9800
C9A—H9A30.9800C9B—H9B30.9800
C10A—H0A10.9800C10B—H01B0.9800
C10A—H0A20.9800C10B—H02B0.9800
C10A—H0A30.9800C10B—H03B0.9800
C11A—C13A1.531 (4)C11B—C12B1.521 (5)
C11A—C14A1.537 (4)C11B—C14B1.530 (4)
C11A—C12A1.544 (4)C11B—C13B1.531 (5)
C12A—H21A0.9800C12B—H21B0.9800
C12A—H22A0.9800C12B—H22B0.9800
C12A—H23A0.9800C12B—H23B0.9800
C13A—H31A0.9800C13B—H31B0.9800
C13A—H32A0.9800C13B—H32B0.9800
C13A—H33A0.9800C13B—H33B0.9800
C14A—H41A0.9800C14B—H41B0.9800
C14A—H42A0.9800C14B—H42B0.9800
C14A—H43A0.9800C14B—H43B0.9800
C15A—H51A0.9800C15B—H51B0.9800
C15A—H52A0.9800C15B—H52B0.9800
C15A—H53A0.9800C15B—H53B0.9800
C16A—H61A0.9800C16B—H61B0.9800
C16A—H62A0.9800C16B—H62B0.9800
C16A—H63A0.9800C16B—H63B0.9800
C17A—C20A1.537 (4)C17B—C19B1.533 (5)
C17A—C19A1.538 (5)C17B—C18B1.537 (4)
C17A—C18A1.552 (5)C17B—C20B1.536 (4)
C18A—H81A0.9800C18B—H81B0.9800
C18A—H82A0.9800C18B—H82B0.9800
C18A—H83A0.9800C18B—H83B0.9800
C19A—H91A0.9800C19B—H91B0.9800
C19A—H92A0.9800C19B—H92B0.9800
C19A—H93A0.9800C19B—H93B0.9800
C20A—H04A0.9800C20B—H04B0.9800
C20A—H05A0.9800C20B—H05B0.9800
C20A—H06A0.9800C20B—H06B0.9800
O4A—Si1A—C9A107.00 (11)O4B—Si1B—C9B109.33 (13)
O4A—Si1A—C10A110.15 (11)O4B—Si1B—C10B110.71 (13)
C9A—Si1A—C10A110.83 (14)C9B—Si1B—C10B108.41 (19)
O4A—Si1A—C11A108.42 (11)O4B—Si1B—C11B104.05 (12)
C9A—Si1A—C11A109.25 (13)C9B—Si1B—C11B112.78 (15)
C10A—Si1A—C11A111.06 (14)C10B—Si1B—C11B111.52 (18)
O5A—Si2A—C15A107.50 (14)O5B—Si2B—C15B109.05 (13)
O5A—Si2A—C16A111.82 (12)O5B—Si2B—C16B110.93 (12)
C15A—Si2A—C16A110.83 (17)C15B—Si2B—C16B110.96 (15)
O5A—Si2A—C17A105.58 (12)O5B—Si2B—C17B105.20 (11)
C15A—Si2A—C17A111.49 (18)C15B—Si2B—C17B110.50 (15)
C16A—Si2A—C17A109.51 (15)C16B—Si2B—C17B110.04 (14)
C5A—O1A—C1A110.69 (18)C5B—O1B—C1B110.48 (18)
C3A—O2A—H2OA109.5C3B—O2B—H2OB109.5
C7A—O3A—H3OA109.5C7B—O3B—H3OB109.5
C2A—O4A—Si1A130.26 (15)C2B—O4B—Si1B124.84 (15)
C6A—O5A—Si2A126.29 (16)C6B—O5B—Si2B126.97 (16)
O1A—C1A—C2A108.26 (18)O1B—C1B—C8B110.58 (19)
O1A—C1A—C8A111.10 (19)O1B—C1B—C2B107.81 (19)
C2A—C1A—C8A115.7 (2)C8B—C1B—C2B117.4 (2)
O1A—C1A—H1A107.1O1B—C1B—H1B106.9
C2A—C1A—H1A107.1C8B—C1B—H1B106.9
C8A—C1A—H1A107.1C2B—C1B—H1B106.9
O4A—C2A—C3A108.64 (19)O4B—C2B—C3B109.00 (19)
O4A—C2A—C1A109.89 (18)O4B—C2B—C1B109.84 (19)
C3A—C2A—C1A113.40 (19)C3B—C2B—C1B113.35 (19)
O4A—C2A—H2A108.3O4B—C2B—H2B108.2
C3A—C2A—H2A108.3C3B—C2B—H2B108.2
C1A—C2A—H2A108.3C1B—C2B—H2B108.2
O2A—C3A—C2A110.40 (19)O2B—C3B—C2B110.38 (19)
O2A—C3A—C4A106.68 (18)O2B—C3B—C4B106.53 (18)
C2A—C3A—C4A111.8 (2)C2B—C3B—C4B111.4 (2)
O2A—C3A—H3A109.3O2B—C3B—H3B109.5
C2A—C3A—H3A109.3C2B—C3B—H3B109.5
C4A—C3A—H3A109.3C4B—C3B—H3B109.5
C3A—C4A—C5A115.1 (2)C5B—C4B—C3B114.3 (2)
C3A—C4A—H4A1108.5C5B—C4B—H4B1108.7
C5A—C4A—H4A1108.5C3B—C4B—H4B1108.7
C3A—C4A—H4A2108.5C5B—C4B—H4B2108.7
C5A—C4A—H4A2108.5C3B—C4B—H4B2108.7
H4A1—C4A—H4A2107.5H4B1—C4B—H4B2107.6
O1A—C5A—C4A110.23 (19)O1B—C5B—C4B109.94 (19)
O1A—C5A—C6A107.8 (2)O1B—C5B—C6B108.6 (2)
C4A—C5A—C6A118.2 (2)C4B—C5B—C6B117.8 (2)
O1A—C5A—H5A106.6O1B—C5B—H5B106.6
C4A—C5A—H5A106.6C4B—C5B—H5B106.6
C6A—C5A—H5A106.6C6B—C5B—H5B106.6
O5A—C6A—C7A111.9 (2)O5B—C6B—C7B112.3 (2)
O5A—C6A—C5A109.0 (2)O5B—C6B—C5B108.1 (2)
C7A—C6A—C5A111.6 (2)C7B—C6B—C5B112.9 (2)
O5A—C6A—H6A108.1O5B—C6B—H6B107.8
C7A—C6A—H6A108.1C7B—C6B—H6B107.8
C5A—C6A—H6A108.1C5B—C6B—H6B107.8
O3A—C7A—C6A111.8 (2)O3B—C7B—C6B108.2 (2)
O3A—C7A—C8A111.0 (2)O3B—C7B—C8B111.6 (2)
C6A—C7A—C8A109.2 (2)C6B—C7B—C8B109.6 (2)
O3A—C7A—H7A108.2O3B—C7B—H7B109.1
C6A—C7A—H7A108.2C6B—C7B—H7B109.1
C8A—C7A—H7A108.2C8B—C7B—H7B109.1
C7A—C8A—C1A114.7 (2)C7B—C8B—C1B114.2 (2)
C7A—C8A—H8A1108.6C7B—C8B—H8B1108.7
C1A—C8A—H8A1108.6C1B—C8B—H8B1108.7
C7A—C8A—H8A2108.6C7B—C8B—H8B2108.7
C1A—C8A—H8A2108.6C1B—C8B—H8B2108.7
H8A1—C8A—H8A2107.6H8B1—C8B—H8B2107.6
Si1A—C9A—H9A1109.5Si1B—C9B—H9B1109.5
Si1A—C9A—H9A2109.5Si1B—C9B—H9B2109.5
H9A1—C9A—H9A2109.5H9B1—C9B—H9B2109.5
Si1A—C9A—H9A3109.5Si1B—C9B—H9B3109.5
H9A1—C9A—H9A3109.5H9B1—C9B—H9B3109.5
H9A2—C9A—H9A3109.5H9B2—C9B—H9B3109.5
Si1A—C10A—H0A1109.5Si1B—C10B—H01B109.5
Si1A—C10A—H0A2109.5Si1B—C10B—H02B109.5
H0A1—C10A—H0A2109.5H01B—C10B—H02B109.5
Si1A—C10A—H0A3109.5Si1B—C10B—H03B109.5
H0A1—C10A—H0A3109.5H01B—C10B—H03B109.5
H0A2—C10A—H0A3109.5H02B—C10B—H03B109.5
C13A—C11A—C14A109.4 (3)C12B—C11B—C14B110.1 (3)
C13A—C11A—C12A109.6 (3)C12B—C11B—C13B109.8 (4)
C14A—C11A—C12A108.1 (3)C14B—C11B—C13B108.0 (3)
C13A—C11A—Si1A109.3 (2)C12B—C11B—Si1B108.8 (2)
C14A—C11A—Si1A109.6 (2)C14B—C11B—Si1B110.4 (2)
C12A—C11A—Si1A110.84 (19)C13B—C11B—Si1B109.7 (2)
C11A—C12A—H21A109.5C11B—C12B—H21B109.5
C11A—C12A—H22A109.5C11B—C12B—H22B109.5
H21A—C12A—H22A109.5H21B—C12B—H22B109.5
C11A—C12A—H23A109.5C11B—C12B—H23B109.5
H21A—C12A—H23A109.5H21B—C12B—H23B109.5
H22A—C12A—H23A109.5H22B—C12B—H23B109.5
C11A—C13A—H31A109.5C11B—C13B—H31B109.5
C11A—C13A—H32A109.5C11B—C13B—H32B109.5
H31A—C13A—H32A109.5H31B—C13B—H32B109.5
C11A—C13A—H33A109.5C11B—C13B—H33B109.5
H31A—C13A—H33A109.5H31B—C13B—H33B109.5
H32A—C13A—H33A109.5H32B—C13B—H33B109.5
C11A—C14A—H41A109.5C11B—C14B—H41B109.5
C11A—C14A—H42A109.5C11B—C14B—H42B109.5
H41A—C14A—H42A109.5H41B—C14B—H42B109.5
C11A—C14A—H43A109.5C11B—C14B—H43B109.5
H41A—C14A—H43A109.5H41B—C14B—H43B109.5
H42A—C14A—H43A109.5H42B—C14B—H43B109.5
Si2A—C15A—H51A109.5Si2B—C15B—H51B109.5
Si2A—C15A—H52A109.5Si2B—C15B—H52B109.5
H51A—C15A—H52A109.5H51B—C15B—H52B109.5
Si2A—C15A—H53A109.5Si2B—C15B—H53B109.5
H51A—C15A—H53A109.5H51B—C15B—H53B109.5
H52A—C15A—H53A109.5H52B—C15B—H53B109.5
Si2A—C16A—H61A109.5Si2B—C16B—H61B109.5
Si2A—C16A—H62A109.5Si2B—C16B—H62B109.5
H61A—C16A—H62A109.5H61B—C16B—H62B109.5
Si2A—C16A—H63A109.5Si2B—C16B—H63B109.5
H61A—C16A—H63A109.5H61B—C16B—H63B109.5
H62A—C16A—H63A109.5H62B—C16B—H63B109.5
C20A—C17A—C19A108.3 (3)C19B—C17B—C18B108.9 (3)
C20A—C17A—C18A109.4 (3)C19B—C17B—C20B109.3 (3)
C19A—C17A—C18A109.4 (3)C18B—C17B—C20B108.8 (3)
C20A—C17A—Si2A111.0 (2)C19B—C17B—Si2B109.7 (2)
C19A—C17A—Si2A109.5 (2)C18B—C17B—Si2B110.2 (2)
C18A—C17A—Si2A109.2 (3)C20B—C17B—Si2B109.9 (2)
C17A—C18A—H81A109.5C17B—C18B—H81B109.5
C17A—C18A—H82A109.5C17B—C18B—H82B109.5
H81A—C18A—H82A109.5H81B—C18B—H82B109.5
C17A—C18A—H83A109.5C17B—C18B—H83B109.5
H81A—C18A—H83A109.5H81B—C18B—H83B109.5
H82A—C18A—H83A109.5H82B—C18B—H83B109.5
C17A—C19A—H91A109.5C17B—C19B—H91B109.5
C17A—C19A—H92A109.5C17B—C19B—H92B109.5
H91A—C19A—H92A109.5H91B—C19B—H92B109.5
C17A—C19A—H93A109.5C17B—C19B—H93B109.5
H91A—C19A—H93A109.5H91B—C19B—H93B109.5
H92A—C19A—H93A109.5H92B—C19B—H93B109.5
C17A—C20A—H04A109.5C17B—C20B—H04B109.5
C17A—C20A—H05A109.5C17B—C20B—H05B109.5
H04A—C20A—H05A109.5H04B—C20B—H05B109.5
C17A—C20A—H06A109.5C17B—C20B—H06B109.5
H04A—C20A—H06A109.5H04B—C20B—H06B109.5
H05A—C20A—H06A109.5H05B—C20B—H06B109.5
C9A—Si1A—O4A—C2A121.7 (2)O4B—C2B—C3B—C4B166.24 (19)
C10A—Si1A—O4A—C2A1.2 (2)C1B—C2B—C3B—C4B43.6 (3)
C11A—Si1A—O4A—C2A120.6 (2)O2B—C3B—C4B—C5B160.9 (2)
C15A—Si2A—O5A—C6A119.1 (2)C2B—C3B—C4B—C5B40.5 (3)
C16A—Si2A—O5A—C6A2.7 (3)C1B—O1B—C5B—C4B64.8 (2)
C17A—Si2A—O5A—C6A121.8 (2)C1B—O1B—C5B—C6B65.3 (2)
C5A—O1A—C1A—C2A67.9 (2)C3B—C4B—C5B—O1B50.6 (3)
C5A—O1A—C1A—C8A60.2 (2)C3B—C4B—C5B—C6B74.5 (3)
Si1A—O4A—C2A—C3A137.65 (18)Si2B—O5B—C6B—C7B88.5 (2)
Si1A—O4A—C2A—C1A97.8 (2)Si2B—O5B—C6B—C5B146.30 (18)
O1A—C1A—C2A—O4A178.33 (18)O1B—C5B—C6B—O5B176.30 (18)
C8A—C1A—C2A—O4A52.9 (3)C4B—C5B—C6B—O5B58.0 (3)
O1A—C1A—C2A—C3A56.5 (2)O1B—C5B—C6B—C7B58.9 (3)
C8A—C1A—C2A—C3A68.9 (3)C4B—C5B—C6B—C7B66.8 (3)
O4A—C2A—C3A—O2A77.1 (2)O5B—C6B—C7B—O3B67.6 (3)
C1A—C2A—C3A—O2A160.38 (18)C5B—C6B—C7B—O3B169.9 (2)
O4A—C2A—C3A—C4A164.26 (19)O5B—C6B—C7B—C8B170.5 (2)
C1A—C2A—C3A—C4A41.8 (3)C5B—C6B—C7B—C8B48.0 (3)
O2A—C3A—C4A—C5A158.3 (2)O3B—C7B—C8B—C1B164.3 (2)
C2A—C3A—C4A—C5A37.6 (3)C6B—C7B—C8B—C1B44.5 (3)
C1A—O1A—C5A—C4A63.7 (2)O1B—C1B—C8B—C7B51.8 (3)
C1A—O1A—C5A—C6A66.7 (2)C2B—C1B—C8B—C7B72.4 (3)
C3A—C4A—C5A—O1A48.0 (3)O4B—Si1B—C11B—C12B52.6 (3)
C3A—C4A—C5A—C6A76.7 (3)C9B—Si1B—C11B—C12B171.0 (3)
Si2A—O5A—C6A—C7A95.9 (2)C10B—Si1B—C11B—C12B66.8 (3)
Si2A—O5A—C6A—C5A140.09 (18)O4B—Si1B—C11B—C14B173.6 (2)
O1A—C5A—C6A—O5A173.38 (18)C9B—Si1B—C11B—C14B68.1 (3)
C4A—C5A—C6A—O5A60.8 (3)C10B—Si1B—C11B—C14B54.2 (3)
O1A—C5A—C6A—C7A62.5 (3)O4B—Si1B—C11B—C13B67.5 (3)
C4A—C5A—C6A—C7A63.3 (3)C9B—Si1B—C11B—C13B50.9 (3)
O5A—C6A—C7A—O3A63.7 (3)C10B—Si1B—C11B—C13B173.1 (3)
C5A—C6A—C7A—O3A173.8 (2)O5B—Si2B—C17B—C19B66.8 (2)
O5A—C6A—C7A—C8A173.02 (19)C15B—Si2B—C17B—C19B175.7 (2)
C5A—C6A—C7A—C8A50.5 (3)C16B—Si2B—C17B—C19B52.8 (2)
O3A—C7A—C8A—C1A167.8 (2)O5B—Si2B—C17B—C18B53.1 (2)
C6A—C7A—C8A—C1A44.1 (3)C15B—Si2B—C17B—C18B64.5 (3)
O1A—C1A—C8A—C7A48.9 (3)C16B—Si2B—C17B—C18B172.6 (2)
C2A—C1A—C8A—C7A75.0 (3)O5B—Si2B—C17B—C20B173.0 (2)
O4A—Si1A—C11A—C13A54.9 (2)C15B—Si2B—C17B—C20B55.5 (3)
C9A—Si1A—C11A—C13A61.4 (2)C16B—Si2B—C17B—C20B67.4 (3)
C10A—Si1A—C11A—C13A176.1 (2)C1A—C2A—O2A—H2OA146.1
O4A—Si1A—C11A—C14A174.8 (2)C6A—C7A—O3A—H3OA71.1
C9A—Si1A—C11A—C14A58.5 (2)C1A—C2A—O4A—Si1A97.8 (2)
C10A—Si1A—C11A—C14A64.1 (2)C2A—O4A—Si1A—C9A121.7 (2)
O4A—Si1A—C11A—C12A66.0 (2)C2A—O4A—Si1A—C10A1.2 (2)
C9A—Si1A—C11A—C12A177.7 (2)C2A—O4A—Si1A—C11A120.6 (2)
C10A—Si1A—C11A—C12A55.1 (3)O4A—Si1A—C11A—C12A66.0 (2)
O5A—Si2A—C17A—C20A177.5 (3)O4A—Si1A—C11A—C13A54.9 (2)
C15A—Si2A—C17A—C20A61.1 (3)O4A—Si1A—C11A—C14A174.8 (2)
C16A—Si2A—C17A—C20A61.9 (3)C5A—C6A—O5A—Si2A140.1 (2)
O5A—Si2A—C17A—C19A62.9 (2)C6A—O5A—Si2A—C15A119.1 (2)
C15A—Si2A—C17A—C19A179.4 (2)C6A—O5A—Si2A—C16A2.7 (3)
C16A—Si2A—C17A—C19A57.6 (3)C6A—O5A—Si2A—C17A121.8 (2)
O5A—Si2A—C17A—C18A56.9 (3)O5A—Si2A—C17A—C18A56.9 (3)
C15A—Si2A—C17A—C18A59.6 (3)O5A—Si2A—C17A—C19A62.9 (2)
C16A—Si2A—C17A—C18A177.4 (2)O5A—Si2A—C17A—C20A177.5 (3)
C9B—Si1B—O4B—C2B67.5 (2)C1B—C2B—O2B—H2OB141.0
C10B—Si1B—O4B—C2B51.9 (3)C6B—C7B—O3B—H3OB136.6
C11B—Si1B—O4B—C2B171.81 (19)C1B—C2B—O4B—Si1B99.2 (2)
C15B—Si2B—O5B—C6B106.0 (2)C2B—O4B—Si1B—C9B67.5 (2)
C16B—Si2B—O5B—C6B16.5 (2)C2B—O4B—Si1B—C10B51.9 (3)
C17B—Si2B—O5B—C6B135.4 (2)C2B—O4B—Si1B—C11B171.8 (2)
C5B—O1B—C1B—C8B62.1 (2)O4B—Si1B—C11B—C12B52.6 (3)
C5B—O1B—C1B—C2B67.4 (2)O4B—Si1B—C11B—C13B67.5 (3)
Si1B—O4B—C2B—C3B136.05 (17)O4B—Si1B—C11B—C14B173.6 (2)
Si1B—O4B—C2B—C1B99.2 (2)C5B—C6B—O5B—Si2B146.3 (2)
O1B—C1B—C2B—O4B178.86 (18)C6B—O5B—Si2B—C15B106.0 (2)
C8B—C1B—C2B—O4B53.3 (3)C6B—O5B—Si2B—C16B16.5 (2)
O1B—C1B—C2B—C3B56.7 (3)C6B—O5B—Si2B—C17B135.4 (2)
C8B—C1B—C2B—C3B68.9 (3)O5B—Si2B—C17B—C18B53.1 (2)
O4B—C2B—C3B—O2B75.6 (2)O5B—Si2B—C17B—C19B66.8 (2)
C1B—C2B—C3B—O2B161.75 (19)O5B—Si2B—C17B—C20B173.0 (2)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O2A—H2OA···O1Ai0.842.052.841 (2)157
O3A—H3OA···O2Aii0.842.132.892 (3)151
O2B—H2OB···O1Bi0.841.922.740 (2)165
O3B—H3OB···O2Biii0.842.002.823 (3)167
Symmetry codes: (i) x, y+1/2, z1/2; (ii) x+1, y1/2, z+1/2; (iii) x, y1/2, z+1/2.
(II) 4,8-Bis(tert-butyldimethylsilyloxy)-2,6-dioxatricyclo[3.3.13,7]decane- 1,3-diol top
Crystal data top
C20H40O6Si2F(000) = 1888
Mr = 432.70Dx = 1.200 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71069 Å
Hall symbol: -P 2ynCell parameters from 37761 reflections
a = 15.0964 (17) Åθ = 5.1–27.5°
b = 13.6368 (15) ŵ = 0.18 mm1
c = 24.291 (2) ÅT = 150 K
β = 106.676 (9)°Block, colourless
V = 4790.3 (9) Å30.60 × 0.60 × 0.50 mm
Z = 8
Data collection top
Nonius KappaCCD
diffractometer
10345 independent reflections
Radiation source: fine-focus sealed tube8213 reflections with I > 2σ(I)
Horizontally mounted graphite crystal monochromatorRint = 0.040
Detector resolution: 9 pixels mm-1θmax = 27.0°, θmin = 5.1°
ϕ and ω scansh = 1917
Absorption correction: multi-scan
(PLATON; Spek, 2003)
k = 1617
Tmin = 0.900, Tmax = 0.916l = 3131
36437 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.044Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.112H-atom parameters constrained
S = 1.05 w = 1/[σ2(Fo2) + (0.0567P)2 + 1.8497P]
where P = (Fo2 + 2Fc2)/3
10345 reflections(Δ/σ)max = 0.001
509 parametersΔρmax = 0.40 e Å3
0 restraintsΔρmin = 0.25 e Å3
Crystal data top
C20H40O6Si2V = 4790.3 (9) Å3
Mr = 432.70Z = 8
Monoclinic, P21/nMo Kα radiation
a = 15.0964 (17) ŵ = 0.18 mm1
b = 13.6368 (15) ÅT = 150 K
c = 24.291 (2) Å0.60 × 0.60 × 0.50 mm
β = 106.676 (9)°
Data collection top
Nonius KappaCCD
diffractometer
10345 independent reflections
Absorption correction: multi-scan
(PLATON; Spek, 2003)
8213 reflections with I > 2σ(I)
Tmin = 0.900, Tmax = 0.916Rint = 0.040
36437 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0440 restraints
wR(F2) = 0.112H-atom parameters constrained
S = 1.05Δρmax = 0.40 e Å3
10345 reflectionsΔρmin = 0.25 e Å3
509 parameters
Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Si1A0.41960 (3)0.04184 (4)0.62090 (2)0.01588 (11)
Si2A0.13487 (3)0.24051 (4)0.60972 (2)0.01651 (11)
O1A0.09501 (8)0.11486 (10)0.52964 (5)0.0222 (3)
O2A0.22341 (8)0.01806 (9)0.69660 (5)0.0191 (3)
H2OA0.27400.04400.71430.023*
O3A0.13396 (9)0.33102 (9)0.65443 (6)0.0243 (3)
H3OA0.09940.32780.67600.029*
O4A0.32825 (8)0.10097 (9)0.62954 (5)0.0196 (3)
O5A0.02308 (8)0.21055 (9)0.63124 (5)0.0194 (3)
O6A0.17437 (8)0.17144 (8)0.66975 (5)0.0157 (3)
C1A0.18808 (12)0.14827 (14)0.55736 (8)0.0205 (4)
H1A0.22320.15120.52820.025*
C2A0.23504 (11)0.07482 (13)0.60411 (7)0.0172 (4)
H2A0.23240.00800.58670.021*
C3A0.18030 (12)0.07453 (12)0.64816 (8)0.0165 (4)
C4A0.08398 (12)0.03681 (13)0.61853 (8)0.0188 (4)
H4A10.04670.03410.64600.023*
H4A20.08720.03000.60330.023*
C5A0.04043 (12)0.10747 (14)0.56967 (8)0.0193 (4)
H5A0.02300.08390.54880.023*
C6A0.03375 (12)0.21011 (13)0.59365 (8)0.0180 (4)
H6A0.00760.25640.56110.022*
C7A0.13187 (12)0.24215 (12)0.62603 (8)0.0176 (4)
C8A0.18757 (13)0.24957 (14)0.58334 (8)0.0214 (4)
H8A10.25150.27100.60290.026*
H8A20.15910.29780.55290.026*
C9A0.48739 (14)0.00420 (16)0.69236 (8)0.0288 (4)
H9A10.50150.05030.71980.035*
H9A20.54520.03340.68940.035*
H9A30.45130.05390.70570.035*
C10A0.38318 (14)0.06307 (14)0.57082 (9)0.0263 (4)
H0A10.34730.03880.53300.032*
H0A20.34490.10790.58580.032*
H0A30.43800.09790.56720.032*
C11A0.48746 (12)0.13426 (14)0.59162 (8)0.0218 (4)
C14A0.51674 (16)0.21995 (16)0.63349 (10)0.0364 (5)
H41A0.46180.25020.64000.044*
H42A0.54990.26870.61720.044*
H43A0.55740.19590.67010.044*
C13A0.57426 (14)0.08543 (17)0.58313 (11)0.0364 (5)
H31A0.61400.06270.62030.044*
H32A0.60810.13300.56660.044*
H33A0.55610.02940.55700.044*
C12A0.42851 (15)0.17405 (18)0.53377 (9)0.0375 (5)
H21A0.37450.20830.53910.045*
H22A0.40790.11950.50680.045*
H23A0.46540.21980.51830.045*
C15A0.18278 (14)0.18649 (15)0.66518 (9)0.0273 (4)
H51A0.25010.19440.65340.033*
H52A0.15620.22000.70190.033*
H53A0.16730.11660.66950.033*
C16A0.19097 (13)0.18904 (14)0.53711 (8)0.0227 (4)
H61A0.18200.11780.53790.027*
H62A0.16320.21840.50920.027*
H63A0.25730.20380.52610.027*
C17A0.15065 (12)0.37782 (13)0.60809 (8)0.0210 (4)
C19A0.09288 (15)0.42424 (15)0.66454 (10)0.0343 (5)
H91A0.10910.49370.66520.041*
H92A0.02700.41820.66740.041*
H93A0.10560.39040.69710.041*
C18A0.12344 (15)0.42309 (14)0.55749 (10)0.0323 (5)
H81A0.05850.40800.56120.039*
H82A0.13170.49440.55760.039*
H83A0.16270.39590.52140.039*
C20A0.25328 (13)0.40016 (16)0.60104 (10)0.0313 (5)
H04A0.27040.37450.63430.038*
H05A0.29150.36890.56590.038*
H06A0.26320.47120.59850.038*
Si1B0.65266 (3)0.30319 (4)0.87712 (2)0.01712 (11)
Si2B0.09529 (4)0.09522 (4)0.84202 (2)0.02305 (13)
O1B0.37631 (8)0.09564 (9)0.78933 (5)0.0193 (3)
O2B0.49282 (9)0.20760 (10)0.95372 (6)0.0266 (3)
H2OB0.51110.26610.95740.032*
O3B0.23018 (9)0.32886 (9)0.83051 (6)0.0254 (3)
H3OB0.24750.38260.82020.031*
O4B0.53851 (8)0.28982 (9)0.85735 (6)0.0212 (3)
O5B0.20150 (8)0.13867 (9)0.86444 (5)0.0194 (3)
O6B0.36471 (8)0.26526 (9)0.88786 (5)0.0195 (3)
C1B0.41857 (12)0.19141 (13)0.79366 (8)0.0184 (4)
H1B0.45080.19820.76320.022*
C2B0.48968 (12)0.20007 (13)0.85272 (8)0.0188 (4)
H2B0.53440.14440.85800.023*
C3B0.43644 (12)0.19251 (13)0.89793 (8)0.0181 (4)
C4B0.39441 (12)0.09087 (13)0.89272 (8)0.0205 (4)
H4B10.36060.08180.92170.025*
H4B20.44360.04050.89920.025*
C5B0.32849 (12)0.08091 (13)0.83250 (8)0.0177 (4)
H5B0.30050.01380.82790.021*
C6B0.25183 (12)0.15708 (12)0.82394 (7)0.0161 (4)
H6B0.20920.15160.78410.019*
C7B0.29680 (12)0.25788 (13)0.83217 (8)0.0181 (4)
C8B0.34638 (12)0.27142 (13)0.78598 (8)0.0192 (4)
H8B10.30150.26690.74730.023*
H8B20.37630.33670.78990.023*
C9B0.66876 (14)0.42870 (14)0.90772 (9)0.0256 (4)
H9B10.73500.44310.92230.031*
H9B20.64040.43310.93920.031*
H9B30.63940.47620.87780.031*
C10B0.70940 (14)0.20805 (14)0.93043 (8)0.0251 (4)
H01B0.67890.20510.96100.030*
H02B0.77480.22480.94710.030*
H03B0.70450.14410.91130.030*
C11B0.70074 (13)0.29389 (14)0.81337 (8)0.0221 (4)
C13B0.80314 (15)0.32337 (19)0.83221 (11)0.0414 (6)
H31B0.80880.39180.84500.050*
H32B0.82900.31610.79980.050*
H33B0.83700.28100.86390.050*
C14B0.69271 (15)0.18841 (15)0.79093 (9)0.0297 (5)
H41B0.71600.18480.75730.036*
H42B0.62780.16800.78010.036*
H43B0.72920.14490.82110.036*
C12B0.64758 (17)0.36152 (17)0.76517 (10)0.0386 (5)
H21B0.67290.35580.73240.046*
H22B0.65350.42940.77890.046*
H23B0.58220.34280.75320.046*
C15B0.01819 (17)0.1903 (2)0.79942 (12)0.0587 (8)
H51B0.04640.17010.79270.070*
H52B0.03140.19860.76250.070*
H53B0.02870.25250.82050.070*
C16B0.09327 (19)0.0162 (2)0.79756 (12)0.0574 (8)
H61B0.09440.00320.75890.069*
H62B0.03690.05370.79500.069*
H63B0.14750.05680.81540.069*
C17B0.06307 (13)0.06365 (14)0.90903 (8)0.0237 (4)
C20B0.03586 (15)0.02295 (18)0.89295 (11)0.0392 (6)
H04B0.07890.07270.87150.047*
H05B0.05220.00590.92800.047*
H06B0.03970.03570.86910.047*
C18B0.06839 (17)0.15516 (16)0.94604 (10)0.0370 (5)
H81B0.02350.20370.92500.044*
H82B0.13080.18290.95510.044*
H83B0.05430.13760.98170.044*
C19B0.12942 (16)0.01414 (17)0.94364 (10)0.0370 (5)
H91B0.12600.07330.92020.044*
H92B0.11190.03030.97840.044*
H93B0.19270.01150.95440.044*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Si1A0.0138 (2)0.0187 (2)0.0159 (2)0.00239 (19)0.00546 (19)0.00093 (19)
Si2A0.0132 (2)0.0187 (2)0.0177 (2)0.00023 (19)0.00467 (19)0.00210 (19)
O1A0.0173 (6)0.0344 (8)0.0145 (6)0.0035 (6)0.0041 (5)0.0031 (6)
O2A0.0181 (6)0.0175 (6)0.0203 (7)0.0000 (5)0.0032 (5)0.0034 (5)
O3A0.0251 (7)0.0169 (6)0.0315 (8)0.0015 (5)0.0091 (6)0.0032 (6)
O4A0.0126 (6)0.0230 (7)0.0232 (7)0.0014 (5)0.0052 (5)0.0037 (5)
O5A0.0153 (6)0.0267 (7)0.0172 (6)0.0035 (5)0.0063 (5)0.0007 (5)
O6A0.0160 (6)0.0150 (6)0.0152 (6)0.0016 (5)0.0031 (5)0.0012 (5)
C1A0.0148 (8)0.0309 (10)0.0170 (9)0.0013 (8)0.0065 (7)0.0007 (8)
C2A0.0126 (8)0.0207 (9)0.0180 (9)0.0006 (7)0.0039 (7)0.0037 (7)
C3A0.0174 (8)0.0146 (8)0.0175 (9)0.0027 (7)0.0053 (7)0.0001 (7)
C4A0.0161 (8)0.0183 (9)0.0233 (10)0.0002 (7)0.0076 (7)0.0036 (7)
C5A0.0142 (8)0.0260 (10)0.0183 (9)0.0015 (7)0.0055 (7)0.0037 (7)
C6A0.0159 (8)0.0232 (9)0.0158 (9)0.0052 (7)0.0057 (7)0.0020 (7)
C7A0.0180 (9)0.0137 (8)0.0207 (9)0.0026 (7)0.0051 (7)0.0016 (7)
C8A0.0198 (9)0.0236 (10)0.0225 (10)0.0015 (7)0.0086 (8)0.0065 (8)
C9A0.0283 (10)0.0341 (11)0.0234 (10)0.0101 (9)0.0066 (8)0.0048 (9)
C10A0.0258 (10)0.0247 (10)0.0312 (11)0.0007 (8)0.0126 (9)0.0085 (8)
C11A0.0173 (9)0.0268 (10)0.0221 (10)0.0023 (8)0.0069 (8)0.0002 (8)
C14A0.0383 (12)0.0279 (11)0.0427 (13)0.0086 (10)0.0114 (11)0.0067 (10)
C13A0.0234 (10)0.0423 (13)0.0500 (14)0.0045 (9)0.0212 (10)0.0027 (11)
C12A0.0325 (12)0.0490 (14)0.0304 (12)0.0107 (10)0.0080 (10)0.0138 (10)
C15A0.0252 (10)0.0331 (11)0.0262 (10)0.0023 (9)0.0115 (9)0.0003 (9)
C16A0.0209 (9)0.0217 (9)0.0233 (10)0.0008 (8)0.0028 (8)0.0027 (8)
C17A0.0161 (9)0.0198 (9)0.0262 (10)0.0017 (7)0.0045 (8)0.0046 (8)
C19A0.0331 (12)0.0254 (11)0.0396 (13)0.0007 (9)0.0030 (10)0.0142 (9)
C18A0.0388 (12)0.0185 (10)0.0432 (13)0.0045 (9)0.0176 (10)0.0026 (9)
C20A0.0223 (10)0.0300 (11)0.0410 (13)0.0082 (9)0.0084 (9)0.0051 (9)
Si1B0.0151 (2)0.0179 (2)0.0193 (3)0.00384 (19)0.00633 (19)0.0024 (2)
Si2B0.0174 (2)0.0325 (3)0.0209 (3)0.0101 (2)0.0081 (2)0.0057 (2)
O1B0.0207 (6)0.0180 (6)0.0222 (7)0.0025 (5)0.0110 (5)0.0051 (5)
O2B0.0264 (7)0.0325 (8)0.0191 (7)0.0092 (6)0.0036 (6)0.0023 (6)
O3B0.0219 (7)0.0160 (6)0.0421 (9)0.0014 (5)0.0150 (6)0.0002 (6)
O4B0.0160 (6)0.0197 (6)0.0290 (7)0.0040 (5)0.0084 (6)0.0005 (5)
O5B0.0165 (6)0.0233 (7)0.0213 (7)0.0063 (5)0.0101 (5)0.0018 (5)
O6B0.0187 (6)0.0199 (6)0.0218 (7)0.0021 (5)0.0088 (5)0.0056 (5)
C1B0.0201 (9)0.0186 (9)0.0202 (9)0.0038 (7)0.0116 (7)0.0009 (7)
C2B0.0152 (8)0.0177 (9)0.0246 (10)0.0010 (7)0.0075 (7)0.0003 (7)
C3B0.0178 (8)0.0199 (9)0.0168 (9)0.0028 (7)0.0053 (7)0.0022 (7)
C4B0.0199 (9)0.0186 (9)0.0240 (10)0.0004 (7)0.0081 (8)0.0031 (8)
C5B0.0183 (9)0.0166 (9)0.0206 (9)0.0027 (7)0.0096 (7)0.0020 (7)
C6B0.0158 (8)0.0184 (9)0.0157 (9)0.0034 (7)0.0072 (7)0.0020 (7)
C7B0.0167 (8)0.0157 (9)0.0231 (9)0.0004 (7)0.0075 (7)0.0007 (7)
C8B0.0183 (9)0.0193 (9)0.0210 (9)0.0028 (7)0.0074 (7)0.0019 (7)
C9B0.0276 (10)0.0224 (10)0.0284 (11)0.0048 (8)0.0107 (9)0.0043 (8)
C10B0.0263 (10)0.0249 (10)0.0232 (10)0.0012 (8)0.0056 (8)0.0010 (8)
C11B0.0179 (9)0.0276 (10)0.0234 (10)0.0050 (8)0.0099 (8)0.0028 (8)
C13B0.0249 (11)0.0567 (15)0.0488 (14)0.0148 (11)0.0205 (11)0.0145 (12)
C14B0.0328 (11)0.0333 (11)0.0273 (11)0.0005 (9)0.0155 (9)0.0050 (9)
C12B0.0542 (15)0.0367 (12)0.0293 (12)0.0036 (11)0.0190 (11)0.0062 (10)
C15B0.0272 (12)0.101 (2)0.0455 (16)0.0071 (14)0.0063 (11)0.0311 (16)
C16B0.0592 (17)0.0719 (19)0.0572 (17)0.0438 (15)0.0428 (15)0.0438 (15)
C17B0.0211 (9)0.0271 (10)0.0265 (10)0.0077 (8)0.0124 (8)0.0025 (8)
C20B0.0296 (11)0.0489 (14)0.0450 (14)0.0151 (10)0.0202 (11)0.0013 (11)
C18B0.0469 (14)0.0367 (12)0.0338 (12)0.0042 (11)0.0218 (11)0.0086 (10)
C19B0.0415 (13)0.0355 (12)0.0371 (13)0.0004 (10)0.0164 (11)0.0068 (10)
Geometric parameters (Å, º) top
Si1A—O4A1.6620 (12)Si1B—O4B1.6609 (13)
Si1A—C9A1.854 (2)Si1B—C9B1.8541 (19)
Si1A—C10A1.8562 (19)Si1B—C10B1.859 (2)
Si1A—C11A1.8873 (19)Si1B—C11B1.8935 (18)
Si2A—O5A1.6680 (13)Si2B—O5B1.6485 (13)
Si2A—C15A1.8548 (19)Si2B—C15B1.848 (3)
Si2A—C16A1.8610 (19)Si2B—C16B1.859 (2)
Si2A—C17A1.8865 (19)Si2B—C17B1.8778 (19)
O1A—C1A1.446 (2)O1B—C1B1.444 (2)
O1A—C5A1.447 (2)O1B—C5B1.4476 (19)
O2A—C3A1.401 (2)O2B—C3B1.393 (2)
O2A—H2OA0.8400O2B—H2OB0.8400
O3A—C7A1.390 (2)O3B—C7B1.388 (2)
O3A—H3OA0.8400O3B—H3OB0.8400
O4A—C2A1.411 (2)O4B—C2B1.416 (2)
O5A—C6A1.4209 (19)O5B—C6B1.4273 (19)
O6A—C3A1.434 (2)O6B—C3B1.437 (2)
O6A—C7A1.442 (2)O6B—C7B1.448 (2)
C1A—C8A1.520 (3)C1B—C8B1.515 (2)
C1A—C2A1.527 (3)C1B—C2B1.530 (3)
C1A—H1A1.0000C1B—H1B1.0000
C2A—C3A1.528 (2)C2B—C3B1.539 (2)
C2A—H2A1.0000C2B—H2B1.0000
C3A—C4A1.515 (2)C3B—C4B1.514 (2)
C4A—C5A1.524 (3)C4B—C5B1.521 (3)
C4A—H4A10.9900C4B—H4B10.9900
C4A—H4A20.9900C4B—H4B20.9900
C5A—C6A1.531 (2)C5B—C6B1.524 (2)
C5A—H5A1.0000C5B—H5B1.0000
C6A—C7A1.528 (2)C6B—C7B1.521 (2)
C6A—H6A1.0000C6B—H6B1.0000
C7A—C8A1.515 (2)C7B—C8B1.528 (2)
C8A—H8A10.9900C8B—H8B10.9900
C8A—H8A20.9900C8B—H8B20.9900
C9A—H9A10.9800C9B—H9B10.9800
C9A—H9A20.9800C9B—H9B20.9800
C9A—H9A30.9800C9B—H9B30.9800
C10A—H0A10.9800C10B—H01B0.9800
C10A—H0A20.9800C10B—H02B0.9800
C10A—H0A30.9800C10B—H03B0.9800
C11A—C14A1.529 (3)C11B—C12B1.525 (3)
C11A—C12A1.531 (3)C11B—C14B1.531 (3)
C11A—C13A1.536 (3)C11B—C13B1.535 (3)
C14A—H41A0.9800C13B—H31B0.9800
C14A—H42A0.9800C13B—H32B0.9800
C14A—H43A0.9800C13B—H33B0.9800
C13A—H31A0.9800C14B—H41B0.9800
C13A—H32A0.9800C14B—H42B0.9800
C13A—H33A0.9800C14B—H43B0.9800
C12A—H21A0.9800C12B—H21B0.9800
C12A—H22A0.9800C12B—H22B0.9800
C12A—H23A0.9800C12B—H23B0.9800
C15A—H51A0.9800C15B—H51B0.9800
C15A—H52A0.9800C15B—H52B0.9800
C15A—H53A0.9800C15B—H53B0.9800
C16A—H61A0.9800C16B—H61B0.9800
C16A—H62A0.9800C16B—H62B0.9800
C16A—H63A0.9800C16B—H63B0.9800
C17A—C18A1.533 (3)C17B—C18B1.527 (3)
C17A—C19A1.535 (3)C17B—C20B1.535 (3)
C17A—C20A1.540 (2)C17B—C19B1.534 (3)
C19A—H91A0.9800C20B—H04B0.9800
C19A—H92A0.9800C20B—H05B0.9800
C19A—H93A0.9800C20B—H06B0.9800
C18A—H81A0.9800C18B—H81B0.9800
C18A—H82A0.9800C18B—H82B0.9800
C18A—H83A0.9800C18B—H83B0.9800
C20A—H04A0.9800C19B—H91B0.9800
C20A—H05A0.9800C19B—H92B0.9800
C20A—H06A0.9800C19B—H93B0.9800
O4A—Si1A—C9A107.53 (8)O4B—Si1B—C9B102.89 (8)
O4A—Si1A—C10A110.87 (8)O4B—Si1B—C10B110.92 (8)
C9A—Si1A—C10A109.44 (10)C9B—Si1B—C10B112.56 (9)
O4A—Si1A—C11A106.47 (8)O4B—Si1B—C11B111.45 (8)
C9A—Si1A—C11A111.44 (9)C9B—Si1B—C11B110.66 (9)
C10A—Si1A—C11A111.00 (9)C10B—Si1B—C11B108.34 (9)
O5A—Si2A—C15A104.21 (8)O5B—Si2B—C15B109.24 (11)
O5A—Si2A—C16A110.43 (7)O5B—Si2B—C16B109.75 (9)
C15A—Si2A—C16A111.86 (9)C15B—Si2B—C16B110.21 (15)
O5A—Si2A—C17A111.10 (7)O5B—Si2B—C17B105.39 (8)
C15A—Si2A—C17A109.65 (9)C15B—Si2B—C17B111.59 (10)
C16A—Si2A—C17A109.52 (9)C16B—Si2B—C17B110.55 (11)
C1A—O1A—C5A111.93 (13)C1B—O1B—C5B111.99 (12)
C3A—O2A—H2OA109.5C3B—O2B—H2OB109.5
C7A—O3A—H3OA109.5C7B—O3B—H3OB109.5
C2A—O4A—Si1A125.6 (1)C2B—O4B—Si1B126.2 (1)
C6A—O5A—Si2A122.9 (1)C6B—O5B—Si2B119.7 (1)
C3A—O6A—C7A114.10 (13)C3B—O6B—C7B114.09 (13)
O1A—C1A—C8A111.08 (14)O1B—C1B—C8B110.80 (14)
O1A—C1A—C2A108.73 (14)O1B—C1B—C2B108.33 (14)
C8A—C1A—C2A110.12 (15)C8B—C1B—C2B110.25 (14)
O1A—C1A—H1A109.0O1B—C1B—H1B109.1
C8A—C1A—H1A109.0C8B—C1B—H1B109.1
C2A—C1A—H1A109.0C2B—C1B—H1B109.1
O4A—C2A—C1A110.59 (14)O4B—C2B—C1B110.50 (14)
O4A—C2A—C3A111.46 (14)O4B—C2B—C3B111.57 (14)
C1A—C2A—C3A107.06 (13)C1B—C2B—C3B107.12 (14)
O4A—C2A—H2A109.2O4B—C2B—H2B109.2
C1A—C2A—H2A109.2C1B—C2B—H2B109.2
C3A—C2A—H2A109.2C3B—C2B—H2B109.2
O2A—C3A—O6A105.20 (13)O2B—C3B—O6B106.49 (14)
O2A—C3A—C4A111.32 (14)O2B—C3B—C4B109.92 (15)
O6A—C3A—C4A109.54 (13)O6B—C3B—C4B109.91 (14)
O2A—C3A—C2A112.04 (14)O2B—C3B—C2B112.69 (14)
O6A—C3A—C2A110.90 (14)O6B—C3B—C2B110.77 (14)
C4A—C3A—C2A107.8 (1)C4B—C3B—C2B107.1 (1)
C3A—C4A—C5A107.21 (14)C3B—C4B—C5B107.75 (14)
C3A—C4A—H4A1110.3C3B—C4B—H4B1110.2
C5A—C4A—H4A1110.3C5B—C4B—H4B1110.2
C3A—C4A—H4A2110.3C3B—C4B—H4B2110.2
C5A—C4A—H4A2110.3C5B—C4B—H4B2110.2
H4A1—C4A—H4A2108.5H4B1—C4B—H4B2108.5
O1A—C5A—C4A111.46 (14)O1B—C5B—C4B111.07 (14)
O1A—C5A—C6A107.72 (14)O1B—C5B—C6B108.88 (14)
C4A—C5A—C6A110.04 (14)C4B—C5B—C6B109.39 (14)
O1A—C5A—H5A109.2O1B—C5B—H5B109.2
C4A—C5A—H5A109.2C4B—C5B—H5B109.2
C6A—C5A—H5A109.2C6B—C5B—H5B109.2
O5A—C6A—C7A110.05 (14)O5B—C6B—C7B111.98 (13)
O5A—C6A—C5A111.49 (14)O5B—C6B—C5B108.64 (14)
C7A—C6A—C5A107.30 (14)C7B—C6B—C5B107.77 (14)
O5A—C6A—H6A109.3O5B—C6B—H6B109.5
C7A—C6A—H6A109.3C7B—C6B—H6B109.5
C5A—C6A—H6A109.3C5B—C6B—H6B109.5
O3A—C7A—O6A106.00 (14)O3B—C7B—O6B106.96 (14)
O3A—C7A—C8A110.09 (14)O3B—C7B—C6B109.52 (14)
O6A—C7A—C8A109.38 (13)O6B—C7B—C6B110.82 (14)
O3A—C7A—C6A112.66 (14)O3B—C7B—C8B113.45 (15)
O6A—C7A—C6A110.41 (14)O6B—C7B—C8B108.24 (14)
C8A—C7A—C6A108.3 (2)C6B—C7B—C8B107.9 (1)
C7A—C8A—C1A107.07 (14)C1B—C8B—C7B108.00 (14)
C7A—C8A—H8A1110.3C1B—C8B—H8B1110.1
C1A—C8A—H8A1110.3C7B—C8B—H8B1110.1
C7A—C8A—H8A2110.3C1B—C8B—H8B2110.1
C1A—C8A—H8A2110.3C7B—C8B—H8B2110.1
H8A1—C8A—H8A2108.6H8B1—C8B—H8B2108.4
Si1A—C9A—H9A1109.5Si1B—C9B—H9B1109.5
Si1A—C9A—H9A2109.5Si1B—C9B—H9B2109.5
H9A1—C9A—H9A2109.5H9B1—C9B—H9B2109.5
Si1A—C9A—H9A3109.5Si1B—C9B—H9B3109.5
H9A1—C9A—H9A3109.5H9B1—C9B—H9B3109.5
H9A2—C9A—H9A3109.5H9B2—C9B—H9B3109.5
Si1A—C10A—H0A1109.5Si1B—C10B—H01B109.5
Si1A—C10A—H0A2109.5Si1B—C10B—H02B109.5
H0A1—C10A—H0A2109.5H01B—C10B—H02B109.5
Si1A—C10A—H0A3109.5Si1B—C10B—H03B109.5
H0A1—C10A—H0A3109.5H01B—C10B—H03B109.5
H0A2—C10A—H0A3109.5H02B—C10B—H03B109.5
C14A—C11A—C12A108.71 (18)C12B—C11B—C14B108.93 (17)
C14A—C11A—C13A109.02 (17)C12B—C11B—C13B109.49 (18)
C12A—C11A—C13A108.91 (17)C14B—C11B—C13B108.81 (17)
C14A—C11A—Si1A110.14 (13)C12B—C11B—Si1B110.27 (13)
C12A—C11A—Si1A110.31 (13)C14B—C11B—Si1B110.15 (12)
C13A—C11A—Si1A109.72 (14)C13B—C11B—Si1B109.17 (14)
C11A—C14A—H41A109.5C11B—C13B—H31B109.5
C11A—C14A—H42A109.5C11B—C13B—H32B109.5
H41A—C14A—H42A109.5H31B—C13B—H32B109.5
C11A—C14A—H43A109.5C11B—C13B—H33B109.5
H41A—C14A—H43A109.5H31B—C13B—H33B109.5
H42A—C14A—H43A109.5H32B—C13B—H33B109.5
C11A—C13A—H31A109.5C11B—C14B—H41B109.5
C11A—C13A—H32A109.5C11B—C14B—H42B109.5
H31A—C13A—H32A109.5H41B—C14B—H42B109.5
C11A—C13A—H33A109.5C11B—C14B—H43B109.5
H31A—C13A—H33A109.5H41B—C14B—H43B109.5
H32A—C13A—H33A109.5H42B—C14B—H43B109.5
C11A—C12A—H21A109.5C11B—C12B—H21B109.5
C11A—C12A—H22A109.5C11B—C12B—H22B109.5
H21A—C12A—H22A109.5H21B—C12B—H22B109.5
C11A—C12A—H23A109.5C11B—C12B—H23B109.5
H21A—C12A—H23A109.5H21B—C12B—H23B109.5
H22A—C12A—H23A109.5H22B—C12B—H23B109.5
Si2A—C15A—H51A109.5Si2B—C15B—H51B109.5
Si2A—C15A—H52A109.5Si2B—C15B—H52B109.5
H51A—C15A—H52A109.5H51B—C15B—H52B109.5
Si2A—C15A—H53A109.5Si2B—C15B—H53B109.5
H51A—C15A—H53A109.5H51B—C15B—H53B109.5
H52A—C15A—H53A109.5H52B—C15B—H53B109.5
Si2A—C16A—H61A109.5Si2B—C16B—H61B109.5
Si2A—C16A—H62A109.5Si2B—C16B—H62B109.5
H61A—C16A—H62A109.5H61B—C16B—H62B109.5
Si2A—C16A—H63A109.5Si2B—C16B—H63B109.5
H61A—C16A—H63A109.5H61B—C16B—H63B109.5
H62A—C16A—H63A109.5H62B—C16B—H63B109.5
C18A—C17A—C19A109.63 (17)C18B—C17B—C20B109.17 (17)
C18A—C17A—C20A108.90 (17)C18B—C17B—C19B109.09 (18)
C19A—C17A—C20A108.26 (16)C20B—C17B—C19B108.91 (17)
C18A—C17A—Si2A110.81 (12)C18B—C17B—Si2B109.88 (14)
C19A—C17A—Si2A110.77 (13)C20B—C17B—Si2B109.72 (14)
C20A—C17A—Si2A108.40 (13)C19B—C17B—Si2B110.05 (13)
C17A—C19A—H91A109.5C17B—C20B—H04B109.5
C17A—C19A—H92A109.5C17B—C20B—H05B109.5
H91A—C19A—H92A109.5H04B—C20B—H05B109.5
C17A—C19A—H93A109.5C17B—C20B—H06B109.5
H91A—C19A—H93A109.5H04B—C20B—H06B109.5
H92A—C19A—H93A109.5H05B—C20B—H06B109.5
C17A—C18A—H81A109.5C17B—C18B—H81B109.5
C17A—C18A—H82A109.5C17B—C18B—H82B109.5
H81A—C18A—H82A109.5H81B—C18B—H82B109.5
C17A—C18A—H83A109.5C17B—C18B—H83B109.5
H81A—C18A—H83A109.5H81B—C18B—H83B109.5
H82A—C18A—H83A109.5H82B—C18B—H83B109.5
C17A—C20A—H04A109.5C17B—C19B—H91B109.5
C17A—C20A—H05A109.5C17B—C19B—H92B109.5
H04A—C20A—H05A109.5H91B—C19B—H92B109.5
C17A—C20A—H06A109.5C17B—C19B—H93B109.5
H04A—C20A—H06A109.5H91B—C19B—H93B109.5
H05A—C20A—H06A109.5H92B—C19B—H93B109.5
C9A—Si1A—O4A—C2A117.87 (15)C7B—O6B—C3B—C2B59.60 (18)
C10A—Si1A—O4A—C2A1.73 (16)O4B—C2B—C3B—O2B53.9 (2)
C11A—Si1A—O4A—C2A122.57 (14)C1B—C2B—C3B—O2B174.97 (14)
C15A—Si2A—O5A—C6A159.98 (14)O4B—C2B—C3B—O6B65.26 (18)
C16A—Si2A—O5A—C6A39.71 (15)C1B—C2B—C3B—O6B55.79 (18)
C17A—Si2A—O5A—C6A82.02 (14)O4B—C2B—C3B—C4B174.90 (14)
C5A—O1A—C1A—C8A60.85 (18)C1B—C2B—C3B—C4B64.05 (18)
C5A—O1A—C1A—C2A60.48 (18)O2B—C3B—C4B—C5B176.05 (14)
Si1A—O4A—C2A—C1A108.74 (15)O6B—C3B—C4B—C5B59.16 (17)
Si1A—O4A—C2A—C3A132.29 (13)C2B—C3B—C4B—C5B61.23 (17)
O1A—C1A—C2A—O4A175.84 (13)C1B—O1B—C5B—C4B59.51 (18)
C8A—C1A—C2A—O4A62.24 (17)C1B—O1B—C5B—C6B61.00 (18)
O1A—C1A—C2A—C3A62.56 (17)C3B—C4B—C5B—O1B58.81 (18)
C8A—C1A—C2A—C3A59.36 (17)C3B—C4B—C5B—C6B61.40 (17)
C7A—O6A—C3A—O2A179.70 (12)Si2B—O5B—C6B—C7B131.92 (13)
C7A—O6A—C3A—C4A60.55 (17)Si2B—O5B—C6B—C5B109.16 (14)
C7A—O6A—C3A—C2A58.36 (17)O1B—C5B—C6B—O5B176.67 (13)
O4A—C2A—C3A—O2A52.01 (19)C4B—C5B—C6B—O5B61.79 (17)
C1A—C2A—C3A—O2A173.07 (14)O1B—C5B—C6B—C7B61.81 (17)
O4A—C2A—C3A—O6A65.21 (18)C4B—C5B—C6B—C7B59.74 (17)
C1A—C2A—C3A—O6A55.85 (18)C3B—O6B—C7B—O3B176.64 (13)
O4A—C2A—C3A—C4A174.86 (14)C3B—O6B—C7B—C6B57.33 (17)
C1A—C2A—C3A—C4A64.09 (17)C3B—O6B—C7B—C8B60.78 (17)
O2A—C3A—C4A—C5A175.55 (13)O5B—C6B—C7B—O3B54.55 (19)
O6A—C3A—C4A—C5A59.63 (17)C5B—C6B—C7B—O3B173.98 (14)
C2A—C3A—C4A—C5A61.16 (17)O5B—C6B—C7B—O6B63.22 (17)
C1A—O1A—C5A—C4A59.02 (19)C5B—C6B—C7B—O6B56.21 (17)
C1A—O1A—C5A—C6A61.80 (18)O5B—C6B—C7B—C8B178.46 (14)
C3A—C4A—C5A—O1A58.34 (18)C5B—C6B—C7B—C8B62.11 (18)
C3A—C4A—C5A—C6A61.11 (17)O1B—C1B—C8B—C7B58.48 (18)
Si2A—O5A—C6A—C7A145.39 (12)C2B—C1B—C8B—C7B61.44 (18)
Si2A—O5A—C6A—C5A95.67 (16)O3B—C7B—C8B—C1B178.41 (15)
O1A—C5A—C6A—O5A176.89 (13)O6B—C7B—C8B—C1B59.88 (18)
C4A—C5A—C6A—O5A61.41 (18)C6B—C7B—C8B—C1B60.09 (18)
O1A—C5A—C6A—C7A62.55 (17)O4B—Si1B—C11B—C12B50.45 (16)
C4A—C5A—C6A—C7A59.16 (17)C9B—Si1B—C11B—C12B63.39 (16)
C3A—O6A—C7A—O3A178.74 (13)C10B—Si1B—C11B—C12B172.75 (14)
C3A—O6A—C7A—C8A60.08 (17)O4B—Si1B—C11B—C14B69.81 (15)
C3A—O6A—C7A—C6A58.96 (17)C9B—Si1B—C11B—C14B176.35 (14)
O5A—C6A—C7A—O3A52.93 (19)C10B—Si1B—C11B—C14B52.50 (16)
C5A—C6A—C7A—O3A174.41 (14)O4B—Si1B—C11B—C13B170.78 (14)
O5A—C6A—C7A—O6A65.37 (17)C9B—Si1B—C11B—C13B56.94 (17)
C5A—C6A—C7A—O6A56.10 (17)C10B—Si1B—C11B—C13B66.92 (16)
O5A—C6A—C7A—C8A174.91 (14)O5B—Si2B—C17B—C18B59.48 (16)
C5A—C6A—C7A—C8A63.61 (17)C15B—Si2B—C17B—C18B58.97 (19)
O3A—C7A—C8A—C1A175.88 (14)C16B—Si2B—C17B—C18B178.00 (16)
O6A—C7A—C8A—C1A59.79 (18)O5B—Si2B—C17B—C20B179.52 (14)
C6A—C7A—C8A—C1A60.57 (18)C15B—Si2B—C17B—C20B61.07 (19)
O1A—C1A—C8A—C7A58.66 (18)C16B—Si2B—C17B—C20B61.96 (18)
C2A—C1A—C8A—C7A61.85 (18)O5B—Si2B—C17B—C19B60.66 (15)
O4A—Si1A—C11A—C14A59.24 (15)C15B—Si2B—C17B—C19B179.12 (17)
C9A—Si1A—C11A—C14A57.73 (16)C16B—Si2B—C17B—C19B57.86 (18)
C10A—Si1A—C11A—C14A180.00 (14)C1A—C2A—O2A—H2OA111
O4A—Si1A—C11A—C12A60.76 (16)C6A—C7A—O3A—H3OA54
C9A—Si1A—C11A—C12A177.73 (14)C1A—C2A—O4A—Si1A108.7 (2)
C10A—Si1A—C11A—C12A60.00 (17)C2A—O4A—Si1A—C9A117.9 (2)
O4A—Si1A—C11A—C13A179.25 (14)C2A—O4A—Si1A—C10A1.7 (2)
C9A—Si1A—C11A—C13A62.28 (17)C2A—O4A—Si1A—C11A122.6 (1)
C10A—Si1A—C11A—C13A59.99 (17)O4A—Si1A—C11A—C12A60.8 (2)
O5A—Si2A—C17A—C18A72.81 (15)O4A—Si1A—C11A—C13A179.3 (1)
C15A—Si2A—C17A—C18A172.54 (14)O4A—Si1A—C11A—C14A59.2 (2)
C16A—Si2A—C17A—C18A49.45 (16)C5A—C6A—O5A—Si2A95.7 (2)
O5A—Si2A—C17A—C19A49.10 (15)C6A—O5A—Si2A—C15A160.0 (1)
C15A—Si2A—C17A—C19A65.56 (15)C6A—O5A—Si2A—C16A39.7 (2)
C16A—Si2A—C17A—C19A171.35 (13)C6A—O5A—Si2A—C17A82.0 (1)
O5A—Si2A—C17A—C20A167.75 (12)O5A—Si2A—C17A—C18A72.8 (2)
C15A—Si2A—C17A—C20A53.10 (16)O5A—Si2A—C17A—C19A49.1 (2)
C16A—Si2A—C17A—C20A70.00 (15)O5A—Si2A—C17A—C20A167.8 (1)
C9B—Si1B—O4B—C2B153.38 (14)C1B—C2B—O2B—H2OB112
C10B—Si1B—O4B—C2B32.79 (16)C6B—C7B—O3B—H3OB155
C11B—Si1B—O4B—C2B88.02 (15)C1B—C2B—O4B—Si1B127.8 (1)
C15B—Si2B—O5B—C6B68.69 (16)C2B—O4B—Si1B—C9B153.4 (1)
C16B—Si2B—O5B—C6B52.24 (17)C2B—O4B—Si1B—C10B32.8 (2)
C17B—Si2B—O5B—C6B171.29 (12)C2B—O4B—Si1B—C11B88.0 (2)
C5B—O1B—C1B—C8B59.92 (18)O4B—Si1B—C11B—C12B50.5 (2)
C5B—O1B—C1B—C2B61.15 (17)O4B—Si1B—C11B—C13B170.8 (1)
Si1B—O4B—C2B—C1B127.81 (13)O4B—Si1B—C11B—C14B69.8 (2)
Si1B—O4B—C2B—C3B113.13 (15)C5B—C6B—O5B—Si2B109.2 (1)
O1B—C1B—C2B—O4B175.24 (12)C6B—O5B—Si2B—C15B68.7 (2)
C8B—C1B—C2B—O4B63.36 (17)C6B—O5B—Si2B—C16B52.2 (2)
O1B—C1B—C2B—C3B63.03 (17)C6B—O5B—Si2B—C17B171.3 (1)
C8B—C1B—C2B—C3B58.37 (17)O5B—Si2B—C17B—C18B59.5 (2)
C7B—O6B—C3B—O2B177.56 (12)O5B—Si2B—C17B—C19B60.7 (2)
C7B—O6B—C3B—C4B58.53 (17)O5B—Si2B—C17B—C20B179.5 (1)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O2A—H2OA···O1B0.842.142.922 (2)154
O2B—H2OB···O1Ai0.842.463.164 (2)142
O3B—H3OB···O2Aii0.841.972.801 (2)171
C6A—H6A···O2Biii1.002.603.463 (2)144
Symmetry codes: (i) x+1/2, y+1/2, z+1/2; (ii) x+1/2, y+1/2, z+3/2; (iii) x1/2, y+1/2, z1/2.

Experimental details

(I)(II)
Crystal data
Chemical formulaC20H42O5Si2C20H40O6Si2
Mr418.72432.70
Crystal system, space groupMonoclinic, P21/cMonoclinic, P21/n
Temperature (K)150150
a, b, c (Å)27.7623 (6), 14.3663 (3), 12.6076 (2)15.0964 (17), 13.6368 (15), 24.291 (2)
β (°) 93.491 (1) 106.676 (9)
V3)5019.10 (17)4790.3 (9)
Z88
Radiation typeMo KαMo Kα
µ (mm1)0.170.18
Crystal size (mm)0.60 × 0.37 × 0.200.60 × 0.60 × 0.50
Data collection
DiffractometerNonius KappaCCD
diffractometer
Nonius KappaCCD
diffractometer
Absorption correctionMulti-scan
(PLATON; Spek, 2003)
Multi-scan
(PLATON; Spek, 2003)
Tmin, Tmax0.907, 0.9680.900, 0.916
No. of measured, independent and
observed [I > 2σ(I)] reflections
33413, 10858, 9400 36437, 10345, 8213
Rint0.0590.040
(sin θ/λ)max1)0.6390.639
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.063, 0.157, 1.10 0.044, 0.112, 1.05
No. of reflections1085810345
No. of parameters492509
H-atom treatmentH-atom parameters constrainedH-atom parameters constrained
Δρmax, Δρmin (e Å3)1.03, 0.350.40, 0.25

Computer programs: COLLECT (Nonius, 2000), HKL DENZO and SCALEPACK (Otwinowski & Minor, 1997), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), WinGX (Farrugia, 1999) and PLATON (Spek, 2003).

Selected geometric parameters (Å, º) for (I) top
O2A—C3A1.436 (3)O2B—C3B1.434 (3)
O3A—C7A1.432 (3)O3B—C7B1.429 (3)
C2A—C3A—C4A111.8 (2)C2B—C3B—C4B111.4 (2)
C6A—C7A—C8A109.2 (2)C6B—C7B—C8B109.6 (2)
C1A—C2A—O2A—H2OA146.1C1B—C2B—O2B—H2OB141.0
C6A—C7A—O3A—H3OA71.1C6B—C7B—O3B—H3OB136.6
C1A—C2A—O4A—Si1A97.8 (2)C1B—C2B—O4B—Si1B99.2 (2)
C2A—O4A—Si1A—C9A121.7 (2)C2B—O4B—Si1B—C9B67.5 (2)
C2A—O4A—Si1A—C10A1.2 (2)C2B—O4B—Si1B—C10B51.9 (3)
C2A—O4A—Si1A—C11A120.6 (2)C2B—O4B—Si1B—C11B171.8 (2)
C5A—C6A—O5A—Si2A140.1 (2)C5B—C6B—O5B—Si2B146.3 (2)
C6A—O5A—Si2A—C15A119.1 (2)C6B—O5B—Si2B—C15B106.0 (2)
C6A—O5A—Si2A—C16A2.7 (3)C6B—O5B—Si2B—C16B16.5 (2)
C6A—O5A—Si2A—C17A121.8 (2)C6B—O5B—Si2B—C17B135.4 (2)
Hydrogen-bond geometry (Å, º) for (I) top
D—H···AD—HH···AD···AD—H···A
O2A—H2OA···O1Ai0.842.052.841 (2)157
O3A—H3OA···O2Aii0.842.132.892 (3)151
O2B—H2OB···O1Bi0.841.922.740 (2)165
O3B—H3OB···O2Biii0.842.002.823 (3)167
Symmetry codes: (i) x, y+1/2, z1/2; (ii) x+1, y1/2, z+1/2; (iii) x, y1/2, z+1/2.
Selected geometric parameters (Å, º) for (II) top
O2A—C3A1.401 (2)O2B—C3B1.393 (2)
O3A—C7A1.390 (2)O3B—C7B1.388 (2)
C4A—C3A—C2A107.8 (1)C4B—C3B—C2B107.1 (1)
C8A—C7A—C6A108.3 (2)C6B—C7B—C8B107.9 (1)
C1A—C2A—O2A—H2OA111C1B—C2B—O2B—H2OB112
C6A—C7A—O3A—H3OA54C6B—C7B—O3B—H3OB155
C1A—C2A—O4A—Si1A108.7 (2)C1B—C2B—O4B—Si1B127.8 (1)
C2A—O4A—Si1A—C9A117.9 (2)C2B—O4B—Si1B—C9B153.4 (1)
C2A—O4A—Si1A—C10A1.7 (2)C2B—O4B—Si1B—C10B32.8 (2)
C2A—O4A—Si1A—C11A122.6 (1)C2B—O4B—Si1B—C11B88.0 (2)
C5A—C6A—O5A—Si2A95.7 (2)C5B—C6B—O5B—Si2B109.2 (1)
C6A—O5A—Si2A—C15A160.0 (1)C6B—O5B—Si2B—C15B68.7 (2)
C6A—O5A—Si2A—C16A39.7 (2)C6B—O5B—Si2B—C16B52.2 (2)
C6A—O5A—Si2A—C17A82.0 (1)C6B—O5B—Si2B—C17B171.3 (1)
Hydrogen-bond geometry (Å, º) for (II) top
D—H···AD—HH···AD···AD—H···A
O2A—H2OA···O1B0.842.142.922 (2)154
O2B—H2OB···O1Ai0.842.463.164 (2)142
O3B—H3OB···O2Aii0.841.972.801 (2)171
C6A—H6A···O2Biii1.002.603.463 (2)144
Symmetry codes: (i) x+1/2, y+1/2, z+1/2; (ii) x+1/2, y+1/2, z+3/2; (iii) x1/2, y+1/2, z1/2.
 

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