Poly[bis­(trimethyl­tin)-μ-glutarato]

The structure of [SnMe₃O₂C(CH₂)₃CO₂SnMe₃]_n or {[Sn₂(CH₃)₆(C₅H₆O₄)]}_n consists of an infinite layer containing penta­coordinate Sn atoms. There are two formula units, A and B, in the asymmetric unit. Glutarate acts as a tetra­dentate bridging ligand, each glutarate being linked to four different Sn atoms, generating two-dimensional sheets. One ligand links the Sn atoms of unit A, the other the Sn atoms of unit B. The sheets are parallel to each other.

Key indicators

• Single-crystal X-ray study
• T = 150 K
• Mean [sigma](C-C) = 0.006 Å
• R factor = 0.031
• wR factor = 0.062
• Data-to-parameter ratio = 29.3

checkCIF/PLATON results

No syntax errors found



Alert level C
STRVA01_ALERT_4_C           Flack test results are ambiguous.
           From the CIF: _refine_ls_abs_structure_Flack    0.500
           From the CIF: _refine_ls_abs_structure_Flack_su    0.020
PLAT033_ALERT_2_C Flack Parameter Value Deviates 2 * su from zero.       0.50
PLAT141_ALERT_4_C su on a - Axis Small or Missing (x 100000) .....         10 Ang.
PLAT764_ALERT_4_C Overcomplete CIF Bond List Detected (Rep/Expd) .       1.14 Ratio

Alert level G
REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is
            correct. If it is not, please give the correct count in the
            _publ_section_exptl_refinement section of the submitted CIF.
           From the CIF: _diffrn_reflns_theta_max           30.02
           From the CIF: _reflns_number_total               9389
           Count of symmetry unique reflns         5523
           Completeness (_total/calc)            170.00%
           TEST3: Check Friedels for noncentro structure
           Estimate of Friedel pairs measured      3866
           Fraction of Friedel pairs measured     0.700
           Are heavy atom types Z>Si present        yes

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   4 ALERT level C = Check and explain
   1 ALERT level G = General alerts; check

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   1 ALERT type 2 Indicator that the structure model may be wrong or deficient
   0 ALERT type 3 Indicator that the structure quality may be low
   4 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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Computing details

Data collection: COLLECT (Nonius, 1997); cell refinement: HKL SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 1998); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).

Poly[bis(trimethyltin)-µ-glutarato]

Crystal data

[Sn2(CH3)6(C5H6O4)]	F(000) = 1776
Mr = 457.68	Dx = 1.786 Mg m^−3 Dm = 1.786 Mg m^−3 Dm measured by not measured
Orthorhombic, P212121	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2ab	Cell parameters from 85056 reflections
a = 10.0053 (1) Å	θ = 2.9–30.0°
b = 13.1391 (2) Å	µ = 2.94 mm^−1
c = 25.9006 (5) Å	T = 150 K
V = 3404.83 (9) Å^3	Block, colourless
Z = 8	0.25 × 0.25 × 0.15 mm

Data collection

Nonius KappaCCD diffractometer	9389 independent reflections
Radiation source: fine-focus sealed tube	8432 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.058
φ and ω scans	θmax = 30.0°, θmin = 3.1°
Absorption correction: multi-scan (SORTAV; Blessing, 1995)	h = −13→14
Tmin = 0.502, Tmax = 0.641	k = −18→18
42835 measured reflections	l = −36→36

Refinement

Refinement on F^2	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F^2 > 2σ(F^2)] = 0.031	H-atom parameters constrained
wR(F^2) = 0.062	w = 1/[σ^2(Fo^2) + (0.0178P)^2 + 3.5855P] where P = (Fo^2 + 2Fc^2)/3
S = 1.04	(Δ/σ)max < 0.003
9389 reflections	Δρmax = 0.72 e Å^−3
320 parameters	Δρmin = −1.11 e Å^−3
0 restraints	Absolute structure: Flack (1983), 3866 Friedel pairs
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: 0.50 (2)

Special details

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 (Ų)

	x	y	z	Uiso*/Ueq
Sn1	0.06139 (3)	0.72411 (2)	0.975517 (9)	0.02341 (6)
Sn2	−0.59702 (3)	0.289237 (19)	0.983204 (10)	0.02409 (6)
Sn3	−0.59362 (3)	0.67537 (2)	0.719223 (10)	0.02360 (6)
Sn4	0.09138 (3)	0.23593 (2)	0.732318 (9)	0.02403 (6)
O1	−0.0970 (3)	0.6309 (2)	0.93905 (10)	0.0295 (6)
O2	−0.2481 (3)	0.6922 (2)	0.99309 (11)	0.0312 (7)
O3	−0.4428 (3)	0.3626 (2)	0.93539 (11)	0.0294 (6)
O4	−0.2814 (3)	0.2724 (2)	0.97135 (11)	0.0317 (7)
O5	−0.4318 (3)	0.5865 (2)	0.68381 (10)	0.0287 (6)
O6	−0.2816 (3)	0.6535 (2)	0.73578 (11)	0.0301 (7)
O7	−0.0698 (2)	0.3250 (2)	0.69527 (10)	0.0283 (6)
O8	−0.2170 (3)	0.2602 (2)	0.74952 (11)	0.0321 (7)
C1	0.1909 (4)	0.6676 (3)	0.91751 (15)	0.0294 (9)
H1A	0.2830	0.6876	0.9254	0.044*
H1B	0.1649	0.6958	0.8840	0.044*
H1C	0.1848	0.5932	0.9163	0.044*
C2	−0.0341 (4)	0.8660 (3)	0.96132 (17)	0.0329 (10)
H2A	0.0338	0.9187	0.9557	0.049*
H2B	−0.0894	0.8844	0.9911	0.049*
H2C	−0.0906	0.8604	0.9306	0.049*
C3	0.0487 (5)	0.6488 (4)	1.04777 (16)	0.0367 (10)
H3A	−0.0181	0.5943	1.0457	0.055*
H3B	0.0225	0.6976	1.0745	0.055*
H3C	0.1360	0.6195	1.0565	0.055*
C4	−0.2169 (4)	0.6386 (3)	0.95539 (15)	0.0248 (8)
C5	−0.3242 (4)	0.5817 (3)	0.92572 (17)	0.0294 (9)
H5A	−0.3786	0.6320	0.9065	0.035*
H5B	−0.3840	0.5479	0.9509	0.035*
C6	−0.2744 (4)	0.5015 (3)	0.88754 (15)	0.0296 (9)
H6A	−0.3492	0.4819	0.8646	0.036*
H6B	−0.2038	0.5321	0.8657	0.036*
C7	−0.2187 (4)	0.4057 (3)	0.91298 (17)	0.0299 (9)
H7A	−0.1780	0.3624	0.8859	0.036*
H7B	−0.1466	0.4258	0.9371	0.036*
C8	−0.3197 (4)	0.3432 (3)	0.94217 (15)	0.0240 (8)
C9	−0.7383 (5)	0.3863 (4)	0.9466 (2)	0.0519 (15)
H9A	−0.7795	0.4309	0.9724	0.078*
H9B	−0.8077	0.3449	0.9300	0.078*
H9C	−0.6930	0.4277	0.9204	0.078*
C10	−0.5126 (4)	0.3371 (4)	1.05443 (16)	0.0352 (10)
H10A	−0.4975	0.2777	1.0766	0.053*
H10B	−0.5740	0.3843	1.0717	0.053*
H10C	−0.4273	0.3715	1.0479	0.053*
C11	−0.5668 (5)	0.1406 (3)	0.95362 (17)	0.0386 (11)
H11A	−0.4965	0.1066	0.9735	0.058*
H11B	−0.5399	0.1449	0.9173	0.058*
H11C	−0.6500	0.1017	0.9564	0.058*
C12	−0.7259 (4)	0.6130 (4)	0.66366 (18)	0.0392 (11)
H12A	−0.7686	0.6682	0.6443	0.059*
H12B	−0.7945	0.5724	0.6812	0.059*
H12C	−0.6756	0.5694	0.6398	0.059*
C13	−0.5747 (5)	0.6040 (3)	0.79220 (16)	0.0367 (10)
H13A	−0.5174	0.6455	0.8145	0.055*
H13B	−0.5348	0.5365	0.7878	0.055*
H13C	−0.6632	0.5971	0.8080	0.055*
C14	−0.5049 (4)	0.8173 (3)	0.70136 (17)	0.0334 (10)
H14A	−0.5748	0.8690	0.6974	0.050*
H14B	−0.4544	0.8115	0.6691	0.050*
H14C	−0.4444	0.8373	0.7293	0.050*
C15	−0.3111 (4)	0.5984 (3)	0.69849 (15)	0.0258 (8)
C16	−0.2056 (4)	0.5424 (3)	0.66806 (15)	0.0243 (8)
H16A	−0.1309	0.5249	0.6915	0.029*
H16B	−0.1699	0.5887	0.6412	0.029*
C17	−0.2550 (4)	0.4449 (3)	0.64197 (15)	0.0260 (8)
H17A	−0.3306	0.4618	0.6188	0.031*
H17B	−0.1822	0.4166	0.6204	0.031*
C18	−0.3001 (4)	0.3644 (3)	0.68042 (16)	0.0274 (9)
H18A	−0.3628	0.3964	0.7051	0.033*
H18B	−0.3501	0.3112	0.6615	0.033*
C19	−0.1890 (4)	0.3135 (3)	0.71078 (16)	0.0266 (8)
C20	0.0726 (5)	0.3066 (3)	0.80561 (15)	0.0373 (10)
H20A	0.1613	0.3258	0.8183	0.056*
H20B	0.0309	0.2591	0.8299	0.056*
H20C	0.0168	0.3676	0.8024	0.056*
C21	0.0050 (4)	0.0928 (3)	0.71434 (18)	0.0351 (10)
H21A	−0.0277	0.0936	0.6787	0.053*
H21B	−0.0697	0.0794	0.7379	0.053*
H21C	0.0725	0.0392	0.7182	0.053*
C22	0.2247 (4)	0.2995 (4)	0.67762 (17)	0.0418 (12)
H22A	0.2055	0.3723	0.6736	0.063*
H22B	0.2133	0.2651	0.6443	0.063*
H22C	0.3168	0.2907	0.6896	0.063*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Sn1	0.01866 (13)	0.02398 (14)	0.02758 (12)	−0.00066 (10)	0.00109 (9)	−0.00234 (11)
Sn2	0.01943 (12)	0.02271 (14)	0.03013 (12)	−0.00074 (11)	−0.00154 (10)	0.00362 (10)
Sn3	0.02012 (13)	0.02231 (14)	0.02835 (12)	0.00194 (11)	−0.00207 (11)	−0.00274 (10)
Sn4	0.02028 (13)	0.02494 (14)	0.02687 (11)	−0.00013 (11)	0.00011 (10)	0.00457 (10)
O1	0.0205 (13)	0.0310 (15)	0.0369 (14)	−0.0011 (13)	−0.0022 (13)	−0.0080 (12)
O2	0.0231 (14)	0.0310 (16)	0.0394 (16)	−0.0004 (13)	−0.0004 (12)	−0.0098 (13)
O3	0.0195 (14)	0.0338 (16)	0.0348 (14)	−0.0023 (12)	−0.0007 (12)	0.0087 (12)
O4	0.0211 (14)	0.0300 (16)	0.0441 (17)	−0.0002 (12)	−0.0033 (12)	0.0087 (14)
O5	0.0190 (15)	0.0320 (15)	0.0352 (15)	0.0040 (12)	−0.0036 (12)	−0.0092 (12)
O6	0.0203 (14)	0.0346 (17)	0.0356 (15)	−0.0006 (12)	−0.0006 (12)	−0.0119 (14)
O7	0.0185 (14)	0.0302 (15)	0.0362 (14)	0.0031 (12)	0.0009 (11)	0.0089 (12)
O8	0.0262 (14)	0.0301 (16)	0.0399 (15)	−0.0055 (13)	−0.0008 (12)	0.0106 (13)
C1	0.027 (2)	0.031 (2)	0.0304 (19)	−0.0008 (18)	0.0066 (16)	−0.0034 (18)
C2	0.031 (2)	0.023 (2)	0.045 (2)	0.0016 (18)	−0.0038 (19)	0.0001 (18)
C3	0.035 (2)	0.038 (3)	0.038 (2)	−0.007 (2)	−0.0016 (19)	0.0094 (19)
C4	0.0194 (19)	0.023 (2)	0.032 (2)	0.0025 (16)	−0.0051 (16)	−0.0009 (16)
C5	0.023 (2)	0.026 (2)	0.039 (2)	−0.0062 (17)	−0.0050 (17)	−0.0001 (18)
C6	0.032 (2)	0.033 (2)	0.0234 (19)	−0.0093 (19)	0.0016 (17)	−0.0016 (16)
C7	0.022 (2)	0.030 (2)	0.038 (2)	−0.0033 (18)	0.0061 (17)	−0.0033 (18)
C8	0.0206 (19)	0.023 (2)	0.0287 (19)	0.0004 (16)	0.0011 (15)	−0.0024 (16)
C9	0.028 (2)	0.063 (4)	0.064 (3)	0.004 (2)	−0.003 (2)	0.031 (3)
C10	0.035 (2)	0.037 (3)	0.034 (2)	−0.009 (2)	0.0037 (18)	−0.0080 (19)
C11	0.043 (3)	0.030 (2)	0.043 (2)	−0.009 (2)	0.000 (2)	−0.0084 (19)
C12	0.029 (2)	0.047 (3)	0.042 (3)	0.002 (2)	−0.009 (2)	−0.015 (2)
C13	0.040 (3)	0.031 (2)	0.038 (2)	0.007 (2)	0.002 (2)	0.0102 (18)
C14	0.036 (2)	0.027 (2)	0.038 (2)	−0.0023 (19)	0.0023 (18)	0.0035 (19)
C15	0.024 (2)	0.025 (2)	0.0284 (19)	0.0022 (17)	−0.0018 (16)	0.0015 (16)
C16	0.0220 (19)	0.024 (2)	0.0266 (18)	−0.0023 (16)	0.0028 (15)	0.0008 (16)
C17	0.024 (2)	0.029 (2)	0.0252 (18)	0.0030 (17)	−0.0035 (16)	−0.0019 (16)
C18	0.023 (2)	0.028 (2)	0.032 (2)	0.0001 (17)	−0.0008 (16)	0.0019 (17)
C19	0.024 (2)	0.020 (2)	0.035 (2)	−0.0012 (16)	−0.0036 (16)	0.0006 (17)
C20	0.044 (3)	0.036 (2)	0.031 (2)	0.006 (2)	0.0033 (19)	−0.0022 (17)
C21	0.032 (2)	0.032 (2)	0.041 (2)	−0.0043 (19)	−0.0093 (19)	0.003 (2)
C22	0.032 (2)	0.054 (3)	0.040 (2)	−0.002 (2)	0.0043 (19)	0.020 (2)

Geometric parameters (Å, º)

Sn1—O1	2.214 (3)	C6—C7	1.526 (6)
Sn1—O2^i	2.346 (3)	C6—H6A	0.9900
Sn2—O3	2.201 (3)	C6—H6B	0.9900
Sn2—O4^ii	2.333 (3)	C7—C8	1.506 (5)
Sn3—O5	2.197 (3)	C7—H7A	0.9900
Sn3—O8^iii	2.343 (3)	C7—H7B	0.9900
Sn4—O7	2.211 (3)	C9—H9A	0.9800
O1—C4	1.276 (5)	C9—H9B	0.9800
O2—C4	1.244 (5)	C9—H9C	0.9800
O3—C8	1.270 (5)	C10—H10A	0.9800
O4—C8	1.258 (5)	C10—H10B	0.9800
O5—C15	1.276 (5)	C10—H10C	0.9800
O6—C15	1.243 (5)	C11—H11A	0.9800
O7—C19	1.268 (5)	C11—H11B	0.9800
O8—C19	1.255 (5)	C11—H11C	0.9800
Sn1—C1	2.119 (4)	C12—H12A	0.9800
Sn1—C3	2.121 (4)	C12—H12B	0.9800
Sn1—C2	2.127 (4)	C12—H12C	0.9800
Sn2—C11	2.119 (4)	C13—H13A	0.9800
Sn2—C10	2.124 (4)	C13—H13B	0.9800
Sn2—C9	2.127 (5)	C13—H13C	0.9800
Sn3—C14	2.117 (4)	C14—H14A	0.9800
Sn3—C13	2.118 (4)	C14—H14B	0.9800
Sn3—C12	2.120 (4)	C14—H14C	0.9800
Sn3—O5	2.197 (3)	C15—C16	1.509 (5)
Sn4—C22	2.118 (4)	C16—C17	1.531 (5)
Sn4—C21	2.122 (4)	C16—H16A	0.9900
Sn4—C20	2.122 (4)	C16—H16B	0.9900
Sn4—O6^iv	2.340 (3)	C17—C18	1.521 (5)
O4—Sn2^v	2.333 (3)	C17—H17A	0.9900
O6—Sn4^vi	2.340 (3)	C17—H17B	0.9900
O8—Sn3^vii	2.343 (3)	C18—C19	1.517 (5)
C1—H1A	0.9800	C18—H18A	0.9900
C1—H1B	0.9800	C18—H18B	0.9900
C1—H1C	0.9800	C20—H20A	0.9800
C2—H2A	0.9800	C20—H20B	0.9800
C2—H2B	0.9800	C20—H20C	0.9800
C2—H2C	0.9800	C21—H21A	0.9800
C3—H3A	0.9800	C21—H21B	0.9800
C3—H3B	0.9800	C21—H21C	0.9800
C3—H3C	0.9800	C22—H22A	0.9800
C4—C5	1.518 (5)	C22—H22B	0.9800
C5—C6	1.529 (6)	C22—H22C	0.9800
C5—H5A	0.9900	O2—Sn1^viii	2.346 (3)
C5—H5B	0.9900
C1—Sn1—C2	117.35 (17)	C8—C7—H7B	108.5
C1—Sn1—C3	119.91 (18)	C6—C7—H7B	108.5
C3—Sn1—C2	122.34 (18)	H7A—C7—H7B	107.5
C10—Sn2—C9	118.3 (2)	O4—C8—O3	121.8 (4)
C11—Sn2—C10	122.02 (19)	O4—C8—C7	120.0 (3)
C11—Sn2—C9	119.1 (2)	O3—C8—C7	118.2 (4)
C13—Sn3—C12	119.36 (19)	Sn2—C9—H9A	109.5
C14—Sn3—C13	123.19 (18)	Sn2—C9—H9B	109.5
C14—Sn3—C12	117.01 (19)	H9A—C9—H9B	109.5
C20—Sn4—C21	123.25 (18)	Sn2—C9—H9C	109.5
C22—Sn4—C20	118.79 (19)	H9A—C9—H9C	109.5
C22—Sn4—C21	117.4 (2)	H9B—C9—H9C	109.5
C1—Sn1—O1	86.64 (13)	Sn2—C10—H10A	109.5
C1—Sn1—O2^i	85.01 (13)	Sn2—C10—H10B	109.5
C2—Sn1—O1	95.15 (14)	H10A—C10—H10B	109.5
C2—Sn1—O2^i	90.80 (14)	Sn2—C10—H10C	109.5
C3—Sn1—O1	94.33 (14)	H10A—C10—H10C	109.5
C3—Sn1—O2^i	87.79 (15)	H10B—C10—H10C	109.5
C9—Sn2—O3	87.29 (15)	Sn2—C11—H11A	109.5
C9—Sn2—O4^ii	84.68 (15)	Sn2—C11—H11B	109.5
C10—Sn2—O3	94.60 (14)	H11A—C11—H11B	109.5
C10—Sn2—O4^ii	88.79 (14)	Sn2—C11—H11C	109.5
C11—Sn2—O3	95.74 (15)	H11A—C11—H11C	109.5
C11—Sn2—O4^ii	88.60 (14)	H11B—C11—H11C	109.5
C12—Sn3—O5	88.33 (14)	Sn3—C12—H12A	109.5
C12—Sn3—O8^iii	85.05 (14)	Sn3—C12—H12B	109.5
C13—Sn3—O5	94.11 (14)	H12A—C12—H12B	109.5
C13—Sn3—O8^iii	88.54 (14)	Sn3—C12—H12C	109.5
C14—Sn3—O5	93.89 (14)	H12A—C12—H12C	109.5
C14—Sn3—O8^iii	89.75 (14)	H12B—C12—H12C	109.5
C20—Sn4—O6^iv	87.64 (14)	Sn3—C13—H13A	109.5
C21—Sn4—O6^iv	89.90 (14)	Sn3—C13—H13B	109.5
C20—Sn4—O7	95.28 (14)	H13A—C13—H13B	109.5
C21—Sn4—O7	94.41 (14)	Sn3—C13—H13C	109.5
C22—Sn4—O6^iv	84.66 (14)	H13A—C13—H13C	109.5
C22—Sn4—O7	87.70 (14)	H13B—C13—H13C	109.5
O1—Sn1—O2^i	171.32 (10)	Sn3—C14—H14A	109.5
O3—Sn2—O4^ii	171.96 (10)	Sn3—C14—H14B	109.5
O5—Sn3—O8^iii	173.34 (10)	H14A—C14—H14B	109.5
O7—Sn4—O6^iv	172.31 (10)	Sn3—C14—H14C	109.5
C4—O1—Sn1	119.2 (2)	H14A—C14—H14C	109.5
C4—O2—Sn1^viii	137.8 (3)	H14B—C14—H14C	109.5
C8—O3—Sn2	120.9 (3)	O6—C15—O5	121.9 (4)
C8—O4—Sn2^v	143.2 (3)	O6—C15—C16	121.6 (3)
C15—O5—Sn3	120.6 (2)	O5—C15—C16	116.6 (3)
C15—O6—Sn4^vi	137.5 (3)	C15—C16—C17	114.4 (3)
C19—O7—Sn4	119.0 (2)	C15—C16—H16A	108.7
C19—O8—Sn3^vii	136.2 (3)	C17—C16—H16A	108.7
Sn1—C1—H1A	109.5	C15—C16—H16B	108.7
Sn1—C1—H1B	109.5	C17—C16—H16B	108.7
H1A—C1—H1B	109.5	H16A—C16—H16B	107.6
Sn1—C1—H1C	109.5	C18—C17—C16	112.9 (3)
H1A—C1—H1C	109.5	C18—C17—H17A	109.0
H1B—C1—H1C	109.5	C16—C17—H17A	109.0
Sn1—C2—H2A	109.5	C18—C17—H17B	109.0
Sn1—C2—H2B	109.5	C16—C17—H17B	109.0
H2A—C2—H2B	109.5	H17A—C17—H17B	107.8
Sn1—C2—H2C	109.5	C19—C18—C17	115.4 (3)
H2A—C2—H2C	109.5	C19—C18—H18A	108.4
H2B—C2—H2C	109.5	C17—C18—H18A	108.4
Sn1—C3—H3A	109.5	C19—C18—H18B	108.4
Sn1—C3—H3B	109.5	C17—C18—H18B	108.4
H3A—C3—H3B	109.5	H18A—C18—H18B	107.5
Sn1—C3—H3C	109.5	O8—C19—O7	121.9 (4)
H3A—C3—H3C	109.5	O8—C19—C18	119.8 (3)
H3B—C3—H3C	109.5	O7—C19—C18	118.2 (3)
O2—C4—O1	122.7 (4)	Sn4—C20—H20A	109.5
O2—C4—C5	119.9 (4)	Sn4—C20—H20B	109.5
O1—C4—C5	117.3 (3)	H20A—C20—H20B	109.5
C4—C5—C6	115.9 (3)	Sn4—C20—H20C	109.5
C4—C5—H5A	108.3	H20A—C20—H20C	109.5
C6—C5—H5A	108.3	H20B—C20—H20C	109.5
C4—C5—H5B	108.3	Sn4—C21—H21A	109.5
C6—C5—H5B	108.3	Sn4—C21—H21B	109.5
H5A—C5—H5B	107.4	H21A—C21—H21B	109.5
C7—C6—C5	114.1 (3)	Sn4—C21—H21C	109.5
C7—C6—H6A	108.7	H21A—C21—H21C	109.5
C5—C6—H6A	108.7	H21B—C21—H21C	109.5
C7—C6—H6B	108.7	Sn4—C22—H22A	109.5
C5—C6—H6B	108.7	Sn4—C22—H22B	109.5
H6A—C6—H6B	107.6	H22A—C22—H22B	109.5
C8—C7—C6	114.9 (3)	Sn4—C22—H22C	109.5
C8—C7—H7A	108.5	H22A—C22—H22C	109.5
C6—C7—H7A	108.5	H22B—C22—H22C	109.5

Symmetry codes: (i) x+1/2, −y+3/2, −z+2; (ii) x−1/2, −y+1/2, −z+2; (iii) −x−1, y+1/2, −z+3/2; (iv) −x, y−1/2, −z+3/2; (v) x+1/2, −y+1/2, −z+2; (vi) −x, y+1/2, −z+3/2; (vii) −x−1, y−1/2, −z+3/2; (viii) x−1/2, −y+3/2, −z+2.