A novel alkaline earth strontium(II) coordination polymer: poly[hexa­aqua­tetra­kis­([mu]₅-pyridine-2,6-di­carboxyl­ato)bis­([mu]₄-pyridine-2,6-di­carboxyl­ato)([mu]₇-sulfato)­hepta­strontium(II)]

The title compound, [Sr₇(C₇H₃NO₄)₆(SO₄)(H₂O)₆]_n, has been synthesized by an ionothermal method using the ionic liquid 1-ethyl-3-methyl­imidazolium ([Emim]Br) as solvent, and characterized by elemental analysis, energy-dispersive X-ray spectroscopy, IR and single-crystal X-ray diffraction. The structure of the compound can be viewed as a three-dimensional coordination polymer composed of Sr²⁺ cations, pyridine-2,6-di­carboxyl­ate anions, sulfate anions and water mol­ecules. The compound not only exhibits a three-dimensional structure with a unique coordination mode of the sulfate anion, but also features the first example of a hepta­nuclear strontium(II) coordination polymer. The structure is further stabilized by O-H...O hydrogen bonds and [pi]-[pi] stacking inter­actions.

S1. Experimental

S1.1. Synthesis and crystallization

All chemicals were of reagent grade quality obtained from commercial sources and were used without further purification. Compound (I) was prepared under ionothermal conditions using the ionic liquid 1-ethyl-3-methyl­imidazolium ([Emim]Br) as solvent. A mixture of Sr(CH₃COO)₂.0.5H₂O (0.22 g, 1 mmol), Na₂SO₄.10H₂O (0.48 g, 1.5 mmol), pyridine-2,6-di­carb­oxy­lic acid (0.08 g, 0.5 mmol) and [Emim]Br (1.0 g, 5.23 mmol) was stirred for 30 min, and then transferred into a Teflon-lined stainless steel autoclave (50 ml) and heated at 443 K for 8 d. After the mixture had been cooled slowly [Cooling rate?] to room temperature, colourless rod-shaped crystals of (I) were obtained. The product was filtered off, washed with deionized water, purified ultrasonically and dried in a vacuum desiccator at ambient temperature [yield 32%, based on Sr(CH₃COO)₂.0.5H₂O]. Attempts to prepare (I) using H₂O (1.0 g) as solvent were unsuccessful. However, it is worth noting that (I) can be obtained using the ionic liquid 1-methyl-3-butyl­imidazolium bromide ([Bmim]Br) as solvent instead of [Emim]Br. This indicates that the solvent ionic liquid plays a crucial role in the formation of (I). At the same time, it also reveals that ionothermal synthesis is a promising technique in preparing MOFs with new structural architectures.

S1.2. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 1. C-bound H atoms were positioned geometrically and refined using a riding model, with C—H = 0.93 Å and U_iso(H) = 1.2U_eq(C). H atoms bonded to atoms O1W, O2W and O3W were located from a difference Fourier map and refined with distance restraints of O1W—H1WA = O1W—H1WB = O2W—H2WA = O3W—H3WA = O3W—H3WB = 0.83 (2) Å, and O2W—H2WB = 0.85 (2) Å. [Revised text OK?]

S2. Comment

Research into metal–organic frameworks (MOFs) is motivated by their intriguing architectures and their wide range of potential applications as functional materials (Lyhs et al., 2012; Schulz & Villinger, 2011; Costes et al., 2006). As is well known, in the design and synthesis of desirable MOFs, the organic ligands play an important role: they can adopt various conformations to meet the different coordination requirements of the metal centres. In some cases, even slight changes in flexibility, functional-group position, length and symmetry of the ligands can have a remarkable impact on the structures of the coordination polymers obtained. Therefore, the judicious choice of organic ligands is crucially important for preparing MOFs. In view of their various coordination modes, organic di­carb­oxy­lic acids are often used as bridging ligands to build MOFs. For example, pyridine-2,6-di­carb­oxy­lic acid shows a wide variation in its coordination behaviour, including chelating, bidentate bridging or chelating bridging modes (Sujit & Parimal, 2003; Qin et al., 2005), and may therefore provide greater opportunities for obtaining MOFs with variable structural features and new properties.

Up to now, a large number of MOFs containing transition metal ions and/or rare earth ions have been synthesized and reported (Ghosh & Bharadwaj, 2004; Lill et al., 2005; Rao et al., 2004). However, in comparison with such well characterized MOFs containing transition metal ions and/or rare earth ions, investigations of MOFs containing the alkaline earth cation Sr²⁺ are relatively rare (Chen et al., 2011). The sulfate anion SO₄^2- can display several different coordination modes, which can be favourable for the formation of more complex structures. For example, it has been used as a bridging ligand in the preparation of polymetallic clusters and polymers (Paul et al., 2002). Thus, it was of particular inter­est to investigate whether the incorporation of pyridine-2,6-di­carb­oxy­lic acid, the alkaline earth cation Sr²⁺ and the sulfate anion (SO₄^2-) might lead to novel MOFs with unexpected structures. In addition, ionothermal synthesis has received great attention and is becoming a promising technique in preparing MOFs due to the different chemistry of the ionic liquid solvent system compared with that of the traditionally used water or alcohols in hydro- and solvothermal methods (Himeur et al., 2010; Pamham & Morris, 2007). In view of the above, and employing sulfate and pyridine-2,6-di­carboxyl­ate (pdc^2-) as ligands, we have obtained the title novel Sr^II metal–organic framework, [Sr₇(pdc)₆(SO₄)(H₂O)₆]_n, (I), containing a heptanuclear strontium(II) cluster, under ionothermal conditions using the ionic liquid 1-ethyl-3-methyl­imidazolium ([Emim]Br) as solvent.

Single-crystal X-ray diffraction analysis reveals that (I) crystallizes in the monoclinic space group P2/c. The asymmetric unit contains four crystallographically independent Sr sites and one S site. The four crystallographically independent Sr^II atoms show three different types of coordination geometry. Atoms Sr1 and Sr2 are both eight-coordinated. Atom Sr1 is bonded to one tridentate pdc^2- ligand (one N atom and two O atoms), one bridging carboxyl­ate O atom, one sulfate anion (one O atom) and three coordinated water molecules, while atom Sr2 is coordinated to one tridentate pdc^2- ligand (one N atom and two O atoms), three bridging carboxyl­ate O atoms, one sulfate anion (one O atom) and one coordinated water molecule. Atom Sr3 is ten-coordinated by eight bridging carboxyl­ate O atoms from four pdc^2- ligands and two O atoms from [ONE?] sulfate anion. Atom Sr4 is nine-coordinated by one tridentate pdc^2- ligand (one N atom and two O atoms), four bridging carboxyl­ate O atoms, one sulfate anion (one O atom) and one coordinated water molecule. The coordination environments of the Sr^II atoms are illustrated in Fig. 1. The Sr—O and Sr—N bond lengths are in the ranges 2.366 (5)–2.768 (5) and 2.641 (5)–2.699 (5) Å, respectively, well within the normal ranges and consistent with previously reported Sr^II-containing compounds (Chen et al., 2011; RoyChowdhury et al., 2004).

The sulfate group coordinates to seven surrounding Sr atoms via eight O—Sr coordination bonds to form a novel heptanuclear Sr₇ cluster. These clusters involve the four crystallographically independent Sr^II atoms, plus their symmetry-related counterparts generated by the twofold axis passing through atoms Sr3 and S1. The sulfate O atoms are all involved in µ₂- bridging inter­actions and each O atom inter­acts with a different Sr atom, except for O14 and O14(-x+2, y, -z+3/2) which coordinate to the same Sr atom (Sr3) (Fig. 2). The S—O bond lengths range from 1.466 (5) to 1.482 (5) Å. The sulfate anion has recently been used widely in the preparation of Ni and Fe metal coordination polymers [please supply some relevant references], but its integration as a bridging ligand in polymetallic Sr²⁺ coordination polymers has never been reported previously. In general, the observed coordination modes of the SO₄^2- anion with metal ions are: µ₂-(κ¹:κ¹), µ₃-(κ¹:κ² or κ¹:κ¹:κ¹) and µ₅-(κ¹:κ¹:κ¹:κ²) [please supply reference(s) to support or provide examples of this claim]. In (I), the SO₄^2- anion embedded in the heptanuclear Sr₇ cluster and coordinates to the Sr²⁺ ions in a µ₇-(κ²:κ²:κ²:κ²) fashion. The Cambridge Structural Database (Version 1.16 with February 2014 updates; Allen, 2002) lists no other structures containing both the SO₄^2- anion and the Sr²⁺ cation, nor structures of any transition metal complexes exhibiting the same sulfate coordination mode. Compound (I) thus enriches the family of Sr-containing coordination polymers.

Within the asymmetric unit unit of (I), the Sr···Sr distances are 4.150 (2) (Sr1···Sr2), 4.433 (2) (Sr2···Sr3), 4.768 (2) (Sr3···Sr4), 4.6986 (18) (Sr4···Sr1), 6.549 (4) (Sr1···Sr3) and 4.828 (2) Å (Sr2···Sr4). The heptanuclear Sr₇ cluster contains six pdc^2- ligands (two in a µ₄-mode and four in a µ₅-mode) [authors please check this, every pdc in my view of the cluster (not including connections outside the cluster) bridges just two Sr cations, so is mu2. However, two of the ligands are tridentate to one Sr and bidentate to the other giving 5 coordination bonds for these ligands, whereas for the other four it is tridentate to one Sr and monodentate to the other giving 4 coordination bonds. Perhaps the authors misunderstand the use of mu and need to rephrase this part], one sulfate anion and six coordinated water molecules of which four are bridging Sr centres (Fig. 2). These Sr₇ groups as building blocks are further connected to each other via –[Sr₇]–(µ₂-O)₂–[Sr₇]–(µ₂-O)₂– linkages involving carboxyl­ate O atoms, leading to the formation of a three-dimensional coordination polymer (Fig. 3). [The pattern given tends to imply a chain structure, not a 3D structure. An alternative description for the authors to consider is the heptanuclear cluster as a node and describe the number of connections from one node to surrounding nodes.]

The structure of (I) is further stabilized by O—H···O hydrogen bonds involving the water molecules, the carboxyl­ate O atoms and the sulfate ligand in a three-dimensional framework; detailed information on the hydrogen bonds is given in the Supporting information. There are also π–π contacts between the pyridine rings of the pdc^2- ligands, Cg1···Cg1ⁱ and Cg2···Cg2ⁱⁱ [symmetry codes: (i) -x + 1, -y + 2, -z; (ii) -x + 2, -y + 1, -z; Cg1 and Cg2 are the centroids of rings A (atoms N2/C9–C13) and B (atoms N3/C16–C20), respectively], which further stabilize the structure, with centroid-to-centroid distances of 4.096 (3) and 3.542 (6) Å, respectively.

The energy-dispersive X-ray spectroscopy (EDS) results for a single crystal of (I) indicate the presence of the elements Sr, S, O, N and C. Elemental analysis (C, H and N) was also performed, using a Perkin–Elmer 240 analyser. Analysis, calculated for (I): C 27.87, H 1.66, N 4.65%; found: C 28.14, H 1.41, N 4.93%. The results are consistent with the single-crystal X-ray structural analysis.

In the IR spectrum of (I) (Fig. 5), the peaks at 1647 and 1271 cm^-1 can be ascribed to C═O and C—O groups. In the low-frequency region, a series of absorptions in the range 1462–1086 cm^-1 (1462, 1387, 1195, 1138 and 1086 cm^-1) can be assigned to the pdc^2- ligands. In addition, the absorption band at 3442 cm^-1 indicates the presence of coordinated water molecules in (I).

In summary, the title novel three-dimensional alkaline earth Sr^II-containing coordination polymer has been synthesized under ionothermal conditions. The compound possesses a heptanuclear strontium(II) cluster and a unique coordination mode of the sulfate anion with Sr²⁺. It enriches the family of alkaline earth cation Sr²⁺ MOFs. The successful synthesis of (I) indicates that more Sr^II-containing coordination polymers with novel structures and physical properties may be obtained using a similar method.

Related literature

For related literature, see: Chen et al. (2011); Costes et al. (2006); Ghosh & Bharadwaj (2004); Himeur et al. (2010); Lill et al. (2005); Lyhs et al. (2012); Pamham & Morris (2007); Paul et al. (2002); Qin et al. (2005); Rao et al. (2004); RoyChowdhury, Komiyama, Yukawa & Bhattacharyya (2004); Schulz & Villinger (2011); Sujit & Parimal (2003).

Computing details

Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures

Fig. 1. The coordination environments of the Sr atoms in (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. [Symmetry codes: (A) -x + 2, -y + 2, -z + 1; (B) -x + 2, y, -z + 3/2; (C) x, y - 1, z; (D) -x + 1, y, -z + 3/2; (E) -x + 2, y - 1, -z + 3/2; (F) x + 1, y, z.]

Fig. 2. The structure of (I) containing a heptanuclear Sr₇ cluster. Displacement ellipsoids are drawn at the 30% probability level.

Fig. 3. A packing diagram for (I), viewed down the a axis. Dashed lines indicate hydrogen bonds. [None are visible - please clarify]

Fig. 4. The IR spectrum of (I).

Poly[hexaaquatetrakis(µ₅-pyridine-2,6-dicarboxylato)bis(µ₄-pyridine-2,6-dicarboxylato)(µ₇-sulfato)heptastrontium(II)]

Crystal data

[Sr7(C7H3NO4)6(SO4)(H2O)6]	F(000) = 1756
Mr = 1808.12	Dx = 2.284 Mg m^−3
Monoclinic, P2/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P2yc	Cell parameters from 2084 reflections
a = 10.820 (6) Å	θ = 2.7–25.5°
b = 10.690 (6) Å	µ = 7.20 mm^−1
c = 22.803 (12) Å	T = 296 K
β = 94.628 (10)°	Rod, colourless
V = 2629 (2) Å^3	0.24 × 0.22 × 0.16 mm
Z = 2

Data collection

Bruker APEXII CCD area-detector diffractometer	4606 independent reflections
Radiation source: fine-focus sealed tube	3109 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.089
ϕ and ω scans	θmax = 25.0°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Bruker, 2008)	h = −12→12
Tmin = 0.277, Tmax = 0.392	k = −11→12
13023 measured reflections	l = −20→27

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.049	Hydrogen site location: inferred from neighbouring sites
wR(F^2) = 0.099	H atoms treated by a mixture of independent and constrained refinement
S = 1.01	w = 1/[σ^2(Fo^2) + (0.0286P)^2] where P = (Fo^2 + 2Fc^2)/3
4606 reflections	(Δ/σ)max = 0.001
425 parameters	Δρmax = 1.07 e Å^−3
6 restraints	Δρmin = −1.12 e Å^−3

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
Sr1	0.83314 (7)	1.20624 (6)	0.70260 (3)	0.01768 (19)
Sr2	0.66692 (6)	0.85660 (6)	0.70483 (3)	0.01735 (18)
Sr3	1.0000	0.62374 (9)	0.7500	0.0157 (2)
Sr4	1.01685 (6)	0.90364 (6)	0.58804 (2)	0.01701 (18)
C1	0.7479 (7)	1.5185 (7)	0.7026 (3)	0.0202 (17)
C2	0.6254 (7)	1.4606 (7)	0.6847 (3)	0.0212 (17)
C3	0.5193 (8)	1.5300 (8)	0.6752 (4)	0.045 (2)
H3	0.5218	1.6166	0.6791	0.055*
C4	0.4111 (9)	1.4711 (9)	0.6600 (4)	0.055 (3)
H4	0.3380	1.5165	0.6536	0.066*
C5	0.4102 (8)	1.3449 (8)	0.6543 (4)	0.039 (2)
H5	0.3365	1.3031	0.6433	0.046*
C6	0.5187 (7)	1.2791 (7)	0.6647 (3)	0.0277 (19)
C7	0.5240 (8)	1.1413 (8)	0.6598 (3)	0.0263 (19)
C8	0.3572 (8)	0.8393 (7)	0.6460 (3)	0.0211 (18)
C9	0.4287 (7)	0.8347 (7)	0.5924 (3)	0.0219 (18)
C10	0.3649 (8)	0.8446 (8)	0.5374 (3)	0.038 (2)
H10	0.2792	0.8545	0.5333	0.046*
C11	0.4331 (8)	0.8391 (10)	0.4897 (3)	0.052 (3)
H11	0.3932	0.8410	0.4520	0.062*
C12	0.5565 (8)	0.8312 (9)	0.4966 (3)	0.044 (3)
H12	0.6027	0.8270	0.4640	0.053*
C13	0.6142 (7)	0.8293 (7)	0.5526 (3)	0.0231 (18)
C14	0.7501 (7)	0.8388 (7)	0.5641 (3)	0.0227 (18)
C15	1.0725 (7)	0.5968 (7)	0.6274 (3)	0.0208 (17)
C16	1.1092 (6)	0.5888 (7)	0.5661 (3)	0.0159 (16)
C17	1.1527 (8)	0.4820 (7)	0.5417 (3)	0.035 (2)
H17	1.1633	0.4092	0.5639	0.042*
C18	1.1805 (8)	0.4841 (7)	0.4842 (3)	0.034 (2)
H18	1.2103	0.4129	0.4667	0.041*
C19	1.1639 (8)	0.5910 (7)	0.4535 (3)	0.028 (2)
H19	1.1793	0.5935	0.4140	0.034*
C20	1.1249 (7)	0.6944 (6)	0.4804 (3)	0.0170 (17)
C21	1.1066 (7)	0.8177 (7)	0.4500 (3)	0.0166 (17)
N1	0.6257 (5)	1.3369 (5)	0.6792 (2)	0.0180 (14)
N2	0.5495 (5)	0.8281 (5)	0.5996 (2)	0.0166 (14)
N3	1.0965 (5)	0.6952 (5)	0.5359 (2)	0.0159 (13)
O1	0.8399 (5)	1.4479 (4)	0.70789 (18)	0.0208 (11)
O2	0.7504 (5)	1.6320 (5)	0.7126 (2)	0.0295 (13)
O3	0.6247 (5)	1.0892 (5)	0.6687 (2)	0.0290 (13)
O4	0.4223 (5)	1.0886 (5)	0.6468 (2)	0.0364 (14)
O5	0.4215 (5)	0.8221 (5)	0.69454 (18)	0.0240 (12)
O6	0.2466 (5)	0.8616 (5)	0.63994 (19)	0.0279 (13)
O7	0.7920 (4)	0.8628 (5)	0.61553 (19)	0.0282 (13)
O8	0.8192 (5)	0.8244 (5)	0.52284 (19)	0.0258 (13)
O9	1.0162 (5)	0.6911 (4)	0.64218 (18)	0.0231 (12)
O10	1.1010 (5)	0.5076 (5)	0.66161 (18)	0.0271 (13)
O11	1.0750 (4)	0.9093 (4)	0.47810 (18)	0.0211 (12)
O12	1.1266 (5)	0.8208 (5)	0.39705 (19)	0.0364 (15)
O13	0.9899 (5)	1.0077 (4)	0.69683 (18)	0.0290 (13)
O14	0.8902 (4)	0.8467 (4)	0.7468 (2)	0.0266 (12)
O2W	0.7429 (5)	1.0526 (5)	0.77500 (19)	0.0261 (13)
O1W	1.1661 (5)	1.1096 (6)	0.5932 (2)	0.0318 (14)
O3W	1.0712 (5)	1.2675 (5)	0.6920 (2)	0.0267 (13)
S1	1.0000	0.9275 (3)	0.7500	0.0255 (7)
H1WB	1.237 (3)	1.081 (7)	0.596 (3)	0.031*
H1WA	1.172 (7)	1.135 (6)	0.5591 (14)	0.031*
H3WB	1.064 (7)	1.341 (3)	0.681 (3)	0.031*
H3WA	1.098 (7)	1.220 (6)	0.667 (2)	0.031*
H2WB	0.690 (5)	1.081 (6)	0.797 (3)	0.031*
H2WA	0.791 (6)	1.015 (6)	0.799 (2)	0.031*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Sr1	0.0199 (4)	0.0185 (4)	0.0147 (3)	0.0001 (3)	0.0018 (3)	−0.0001 (3)
Sr2	0.0158 (4)	0.0169 (4)	0.0197 (3)	0.0002 (3)	0.0031 (3)	−0.0004 (3)
Sr3	0.0171 (6)	0.0149 (6)	0.0149 (4)	0.000	0.0009 (4)	0.000
Sr4	0.0183 (4)	0.0177 (4)	0.0154 (3)	0.0002 (3)	0.0040 (3)	0.0006 (3)
C1	0.009 (5)	0.021 (5)	0.030 (4)	−0.003 (4)	−0.006 (3)	0.001 (4)
C2	0.014 (5)	0.023 (5)	0.027 (4)	−0.004 (3)	−0.001 (3)	−0.006 (3)
C3	0.018 (6)	0.027 (6)	0.089 (7)	−0.002 (4)	−0.005 (5)	−0.012 (5)
C4	0.027 (6)	0.044 (7)	0.091 (7)	0.011 (5)	−0.006 (5)	−0.006 (6)
C5	0.014 (5)	0.032 (6)	0.069 (6)	0.006 (4)	−0.010 (4)	−0.012 (4)
C6	0.024 (5)	0.030 (5)	0.030 (4)	−0.005 (4)	0.002 (4)	0.001 (4)
C7	0.024 (5)	0.036 (6)	0.019 (4)	−0.011 (4)	0.002 (3)	−0.003 (4)
C8	0.027 (6)	0.019 (5)	0.016 (4)	0.001 (4)	−0.001 (3)	−0.005 (3)
C9	0.026 (5)	0.020 (5)	0.020 (4)	−0.004 (4)	0.006 (3)	−0.002 (3)
C10	0.013 (5)	0.073 (7)	0.028 (4)	−0.006 (4)	0.000 (3)	−0.005 (4)
C11	0.015 (6)	0.124 (10)	0.016 (4)	−0.007 (5)	−0.005 (3)	−0.003 (5)
C12	0.021 (6)	0.093 (8)	0.021 (4)	−0.008 (5)	0.009 (4)	−0.010 (4)
C13	0.017 (5)	0.023 (5)	0.029 (4)	−0.007 (3)	0.000 (3)	−0.001 (3)
C14	0.014 (5)	0.019 (5)	0.037 (4)	−0.006 (3)	0.011 (4)	−0.001 (4)
C15	0.024 (5)	0.023 (5)	0.016 (3)	−0.002 (4)	0.005 (3)	0.003 (3)
C16	0.017 (4)	0.017 (4)	0.013 (3)	−0.001 (3)	−0.001 (3)	0.000 (3)
C17	0.054 (6)	0.020 (5)	0.031 (4)	0.012 (4)	0.010 (4)	0.001 (4)
C18	0.052 (6)	0.021 (5)	0.031 (4)	0.018 (4)	0.011 (4)	−0.006 (4)
C19	0.048 (6)	0.018 (5)	0.020 (4)	0.003 (4)	0.010 (4)	−0.001 (3)
C20	0.022 (5)	0.016 (4)	0.013 (3)	−0.001 (3)	0.001 (3)	0.004 (3)
C21	0.014 (4)	0.018 (5)	0.019 (4)	−0.004 (3)	0.004 (3)	−0.002 (3)
N1	0.013 (4)	0.018 (4)	0.023 (3)	0.000 (3)	0.000 (3)	−0.004 (3)
N2	0.016 (4)	0.019 (4)	0.016 (3)	0.000 (3)	0.009 (3)	−0.003 (2)
N3	0.019 (4)	0.014 (4)	0.015 (3)	0.000 (3)	0.001 (2)	0.001 (2)
O1	0.018 (3)	0.015 (3)	0.029 (3)	0.001 (2)	0.002 (2)	−0.005 (2)
O2	0.030 (4)	0.013 (3)	0.045 (3)	0.001 (3)	−0.004 (3)	−0.004 (2)
O3	0.034 (4)	0.014 (3)	0.037 (3)	0.001 (3)	−0.010 (3)	0.002 (2)
O4	0.032 (4)	0.029 (4)	0.050 (3)	−0.006 (3)	0.009 (3)	−0.002 (3)
O5	0.022 (3)	0.032 (3)	0.018 (2)	0.004 (2)	0.006 (2)	0.001 (2)
O6	0.014 (3)	0.042 (4)	0.027 (3)	0.000 (3)	0.000 (2)	−0.008 (2)
O7	0.015 (3)	0.045 (4)	0.024 (3)	−0.003 (3)	−0.002 (2)	−0.001 (2)
O8	0.023 (3)	0.029 (3)	0.027 (3)	−0.006 (2)	0.012 (2)	−0.003 (2)
O9	0.028 (3)	0.025 (3)	0.017 (2)	0.007 (3)	0.005 (2)	0.000 (2)
O10	0.035 (4)	0.019 (3)	0.027 (3)	0.007 (3)	0.001 (2)	0.010 (2)
O11	0.025 (3)	0.019 (3)	0.020 (2)	0.002 (2)	0.005 (2)	0.005 (2)
O12	0.062 (5)	0.033 (4)	0.015 (3)	0.002 (3)	0.009 (3)	0.004 (2)
O13	0.039 (4)	0.020 (3)	0.029 (3)	0.001 (3)	0.006 (2)	0.007 (2)
O14	0.015 (3)	0.016 (3)	0.048 (3)	−0.004 (2)	−0.002 (2)	−0.001 (2)
O2W	0.026 (4)	0.031 (4)	0.021 (3)	0.001 (3)	0.002 (2)	0.000 (2)
O1W	0.021 (3)	0.046 (4)	0.028 (3)	0.001 (3)	−0.001 (3)	0.012 (3)
O3W	0.035 (4)	0.021 (3)	0.025 (3)	0.002 (3)	0.006 (2)	0.000 (2)
S1	0.0223 (18)	0.0239 (17)	0.0311 (14)	0.000	0.0073 (12)	0.000

Geometric parameters (Å, º)

Sr1—O12^i	2.366 (5)	C8—O6	1.217 (8)
Sr1—O2W	2.576 (5)	C8—O5	1.273 (8)
Sr1—O1	2.587 (5)	C8—C9	1.498 (10)
Sr1—O3W^ii	2.623 (5)	C9—N2	1.305 (9)
Sr1—O3	2.640 (5)	C9—C10	1.386 (9)
Sr1—N1	2.661 (6)	C10—C11	1.365 (11)
Sr1—O3W	2.688 (6)	C10—H10	0.9300
Sr1—O13	2.726 (5)	C11—C12	1.334 (11)
Sr2—O14	2.529 (5)	C11—H11	0.9300
Sr2—O7	2.535 (5)	C12—C13	1.377 (10)
Sr2—O2^iii	2.566 (5)	C12—H12	0.9300
Sr2—O5^iv	2.583 (4)	C13—N2	1.327 (8)
Sr2—N2	2.641 (5)	C13—C14	1.476 (10)
Sr2—O3	2.648 (5)	C14—O7	1.250 (8)
Sr2—O5	2.672 (5)	C14—O8	1.257 (8)
Sr2—O2W	2.723 (5)	C15—O9	1.238 (8)
Sr3—O9^ii	2.581 (4)	C15—O10	1.255 (8)
Sr3—O9	2.581 (4)	C15—C16	1.484 (8)
Sr3—O14^ii	2.661 (5)	C16—N3	1.332 (8)
Sr3—O14	2.661 (5)	C16—C17	1.370 (9)
Sr3—O10	2.675 (5)	C17—C18	1.369 (9)
Sr3—O10^ii	2.675 (5)	C17—H17	0.9300
Sr3—O1^iii	2.681 (5)	C18—C19	1.344 (10)
Sr3—O1^v	2.681 (5)	C18—H18	0.9300
Sr3—O2^v	2.768 (5)	C19—C20	1.349 (9)
Sr3—O2^iii	2.768 (5)	C19—H19	0.9300
Sr4—O9	2.586 (5)	C20—N3	1.325 (7)
Sr4—O7	2.598 (5)	C20—C21	1.496 (9)
Sr4—O11	2.634 (4)	C21—O11	1.234 (7)
Sr4—O8	2.644 (5)	C21—O12	1.243 (7)
Sr4—O11^i	2.649 (5)	O1—Sr3^vii	2.681 (5)
Sr4—N3	2.699 (5)	O2—Sr2^vii	2.566 (5)
Sr4—O6^vi	2.703 (5)	O2—Sr3^vii	2.768 (5)
Sr4—O1W	2.728 (6)	O5—Sr2^iv	2.583 (4)
Sr4—O13	2.756 (5)	O6—Sr4^viii	2.703 (5)
C1—O2	1.234 (8)	O11—Sr4^i	2.649 (5)
C1—O1	1.247 (8)	O12—Sr1^i	2.366 (5)
C1—C2	1.489 (10)	S1—O14^ii	1.466 (5)
C2—N1	1.329 (9)	S1—O13^ii	1.482 (5)
C2—C3	1.369 (11)	O13—S1	1.482 (5)
C3—C4	1.350 (12)	O14—S1	1.466 (5)
C3—H3	0.9300	O2W—H2WB	0.85 (2)
C4—C5	1.355 (11)	O2W—H2WA	0.83 (2)
C4—H4	0.9300	O1W—H1WB	0.83 (2)
C5—C6	1.372 (11)	O1W—H1WA	0.83 (2)
C5—H5	0.9300	O3W—Sr1^ii	2.623 (5)
C6—N1	1.330 (9)	O3W—H3WB	0.83 (2)
C6—C7	1.479 (11)	O3W—H3WA	0.83 (2)
C7—O3	1.226 (9)	S1—Sr1^ii	3.605 (3)
C7—O4	1.250 (9)
O12^i—Sr1—O2W	130.27 (17)	O9—Sr4—O8	87.36 (15)
O12^i—Sr1—O1	99.21 (16)	O7—Sr4—O8	49.53 (14)
O2W—Sr1—O1	128.14 (15)	O11—Sr4—O8	73.55 (15)
O12^i—Sr1—O3W^ii	145.22 (19)	O9—Sr4—O11^i	156.86 (15)
O2W—Sr1—O3W^ii	73.36 (16)	O7—Sr4—O11^i	87.04 (15)
O1—Sr1—O3W^ii	72.56 (15)	O11—Sr4—O11^i	63.15 (18)
O12^i—Sr1—O3	83.12 (18)	O8—Sr4—O11^i	70.86 (15)
O2W—Sr1—O3	61.74 (16)	O9—Sr4—N3	59.90 (15)
O1—Sr1—O3	120.47 (16)	O7—Sr4—N3	107.85 (17)
O3W^ii—Sr1—O3	130.65 (16)	O11—Sr4—N3	59.36 (15)
O12^i—Sr1—N1	95.11 (18)	O8—Sr4—N3	76.15 (16)
O2W—Sr1—N1	96.10 (18)	O11^i—Sr4—N3	119.38 (15)
O1—Sr1—N1	60.36 (17)	O9—Sr4—O6^vi	71.51 (16)
O3W^ii—Sr1—N1	108.48 (17)	O7—Sr4—O6^vi	135.45 (15)
O3—Sr1—N1	60.20 (17)	O11—Sr4—O6^vi	97.96 (15)
O12^i—Sr1—O3W	71.99 (17)	O8—Sr4—O6^vi	150.09 (15)
O2W—Sr1—O3W	128.95 (17)	O11^i—Sr4—O6^vi	131.62 (15)
O1—Sr1—O3W	74.76 (16)	N3—Sr4—O6^vi	74.97 (15)
O3W^ii—Sr1—O3W	73.25 (17)	O9—Sr4—O1W	135.47 (15)
O3—Sr1—O3W	153.06 (15)	O7—Sr4—O1W	133.48 (17)
N1—Sr1—O3W	130.77 (18)	O11—Sr4—O1W	80.57 (15)
O12^i—Sr1—O13	72.24 (16)	O8—Sr4—O1W	137.07 (15)
O2W—Sr1—O13	78.70 (16)	O11^i—Sr4—O1W	66.99 (15)
O1—Sr1—O13	139.84 (16)	N3—Sr4—O1W	118.42 (17)
O3W^ii—Sr1—O13	92.16 (15)	O6^vi—Sr4—O1W	66.09 (16)
O3—Sr1—O13	97.88 (16)	O9—Sr4—O13	85.44 (14)
N1—Sr1—O13	156.46 (16)	O7—Sr4—O13	71.41 (15)
O3W—Sr1—O13	65.22 (16)	O11—Sr4—O13	153.92 (15)
O12^i—Sr1—S1	93.46 (13)	O8—Sr4—O13	119.73 (15)
O2W—Sr1—S1	59.15 (13)	O11^i—Sr4—O13	98.38 (14)
O1—Sr1—S1	143.14 (11)	N3—Sr4—O13	142.25 (15)
O3W^ii—Sr1—S1	77.33 (12)	O6^vi—Sr4—O13	80.41 (15)
O3—Sr1—S1	95.25 (12)	O1W—Sr4—O13	74.98 (15)
N1—Sr1—S1	152.63 (13)	O9—Sr4—C14	80.98 (18)
O3W—Sr1—S1	76.59 (12)	O7—Sr4—C14	24.74 (16)
O13—Sr1—S1	21.95 (9)	O11—Sr4—C14	97.67 (18)
O12^i—Sr1—Sr1^ii	106.66 (15)	O8—Sr4—C14	24.96 (16)
O2W—Sr1—Sr1^ii	91.46 (12)	O11^i—Sr4—C14	75.96 (17)
O1—Sr1—Sr1^ii	87.40 (11)	N3—Sr4—C14	93.81 (19)
O3W^ii—Sr1—Sr1^ii	40.80 (12)	O6^vi—Sr4—C14	152.35 (18)
O3—Sr1—Sr1^ii	149.20 (11)	O1W—Sr4—C14	139.31 (18)
N1—Sr1—Sr1^ii	143.83 (12)	O13—Sr4—C14	95.03 (18)
O3W—Sr1—Sr1^ii	39.61 (10)	O9—Sr4—C21^i	152.67 (17)
O13—Sr1—Sr1^ii	59.69 (10)	O7—Sr4—C21^i	81.37 (17)
S1—Sr1—Sr1^ii	55.76 (3)	O11—Sr4—C21^i	81.62 (16)
O12^i—Sr1—Sr2	90.88 (13)	O8—Sr4—C21^i	81.46 (16)
O2W—Sr1—Sr2	39.73 (11)	O11^i—Sr4—C21^i	19.63 (13)
O1—Sr1—Sr2	155.43 (11)	N3—Sr4—C21^i	139.00 (15)
O3W^ii—Sr1—Sr2	110.68 (12)	O6^vi—Sr4—C21^i	126.47 (16)
O3—Sr1—Sr2	38.36 (11)	O1W—Sr4—C21^i	61.05 (17)
N1—Sr1—Sr2	96.65 (14)	O13—Sr4—C21^i	78.75 (15)
O3W—Sr1—Sr2	129.80 (12)	C14—Sr4—C21^i	78.40 (19)
O13—Sr1—Sr2	64.62 (11)	O9—Sr4—Sr4^i	145.56 (10)
S1—Sr1—Sr2	57.24 (4)	O7—Sr4—Sr4^i	106.38 (10)
Sr1^ii—Sr1—Sr2	111.20 (2)	O11—Sr4—Sr4^i	31.67 (10)
O12^i—Sr1—Sr4	42.51 (13)	O8—Sr4—Sr4^i	68.98 (10)
O2W—Sr1—Sr4	96.70 (12)	O11^i—Sr4—Sr4^i	31.48 (10)
O1—Sr1—Sr4	134.57 (10)	N3—Sr4—Sr4^i	89.45 (11)
O3W^ii—Sr1—Sr4	121.89 (12)	O6^vi—Sr4—Sr4^i	118.16 (11)
O3—Sr1—Sr4	84.30 (12)	O1W—Sr4—Sr4^i	70.97 (10)
N1—Sr1—Sr4	129.61 (12)	O13—Sr4—Sr4^i	127.69 (10)
O3W—Sr1—Sr4	70.49 (11)	C14—Sr4—Sr4^i	86.29 (14)
O13—Sr1—Sr4	31.19 (9)	C21^i—Sr4—Sr4^i	50.23 (11)
S1—Sr1—Sr4	51.20 (3)	O2—C1—O1	124.8 (7)
Sr1^ii—Sr1—Sr4	84.14 (3)	O2—C1—C2	117.7 (7)
Sr2—Sr1—Sr4	65.79 (3)	O1—C1—C2	117.5 (7)
O12^i—Sr1—H3WB	71.2 (14)	O2—C1—Sr3^vii	64.4 (4)
O2W—Sr1—H3WB	141.7 (11)	O1—C1—Sr3^vii	60.5 (4)
O1—Sr1—H3WB	60.0 (9)	C2—C1—Sr3^vii	174.7 (5)
O3W^ii—Sr1—H3WB	75.8 (13)	N1—C2—C3	122.2 (7)
O3—Sr1—H3WB	153.5 (13)	N1—C2—C1	115.5 (7)
N1—Sr1—H3WB	114.9 (8)	C3—C2—C1	122.3 (8)
O3W—Sr1—H3WB	15.9 (8)	C4—C3—C2	119.1 (9)
O13—Sr1—H3WB	80.5 (9)	C4—C3—H3	120.5
S1—Sr1—H3WB	92.5 (8)	C2—C3—H3	120.5
Sr1^ii—Sr1—H3WB	50.3 (11)	C3—C4—C5	119.3 (9)
Sr2—Sr1—H3WB	144.4 (9)	C3—C4—H4	120.4
Sr4—Sr1—H3WB	80.9 (11)	C5—C4—H4	120.4
O14—Sr2—O7	75.50 (15)	C4—C5—C6	119.6 (8)
O14—Sr2—O2^iii	67.32 (16)	C4—C5—H5	120.2
O7—Sr2—O2^iii	82.66 (17)	C6—C5—H5	120.2
O14—Sr2—O5^iv	93.93 (16)	N1—C6—C5	121.4 (8)
O7—Sr2—O5^iv	167.79 (16)	N1—C6—C7	116.3 (7)
O2^iii—Sr2—O5^iv	87.65 (16)	C5—C6—C7	122.3 (8)
O14—Sr2—N2	135.60 (17)	O3—C7—O4	126.1 (8)
O7—Sr2—N2	61.45 (16)	O3—C7—C6	118.6 (7)
O2^iii—Sr2—N2	95.47 (16)	O4—C7—C6	115.3 (8)
O5^iv—Sr2—N2	127.25 (17)	O6—C8—O5	126.2 (7)
O14—Sr2—O3	107.03 (16)	O6—C8—C9	118.8 (6)
O7—Sr2—O3	79.35 (17)	O5—C8—C9	115.0 (7)
O2^iii—Sr2—O3	161.99 (16)	N2—C9—C10	122.6 (7)
O5^iv—Sr2—O3	110.08 (16)	N2—C9—C8	118.5 (6)
N2—Sr2—O3	76.55 (15)	C10—C9—C8	118.8 (7)
O14—Sr2—O5	160.03 (14)	C11—C10—C9	117.1 (8)
O7—Sr2—O5	121.61 (14)	C11—C10—H10	121.4
O2^iii—Sr2—O5	102.64 (16)	C9—C10—H10	121.4
O5^iv—Sr2—O5	67.77 (16)	C12—C11—C10	120.6 (7)
N2—Sr2—O5	60.16 (15)	C12—C11—H11	119.7
O3—Sr2—O5	87.53 (16)	C10—C11—H11	119.7
O14—Sr2—O2W	64.89 (16)	C11—C12—C13	119.0 (7)
O7—Sr2—O2W	107.23 (16)	C11—C12—H12	120.5
O2^iii—Sr2—O2W	126.27 (16)	C13—C12—H12	120.5
O5^iv—Sr2—O2W	72.76 (15)	N2—C13—C12	121.3 (7)
N2—Sr2—O2W	136.32 (16)	N2—C13—C14	116.2 (6)
O3—Sr2—O2W	59.77 (15)	C12—C13—C14	122.3 (7)
O5—Sr2—O2W	114.11 (16)	O7—C14—O8	122.3 (7)
O14—Sr2—C14	92.15 (17)	O7—C14—C13	117.5 (6)
O7—Sr2—C14	17.51 (16)	O8—C14—C13	120.2 (7)
O2^iii—Sr2—C14	83.94 (16)	O7—C14—Sr4	60.4 (4)
O5^iv—Sr2—C14	166.83 (16)	O8—C14—Sr4	62.6 (4)
N2—Sr2—C14	44.12 (18)	C13—C14—Sr4	170.4 (5)
O3—Sr2—C14	79.13 (16)	O8—C14—Sr2	158.4 (5)
O5—Sr2—C14	104.22 (16)	C13—C14—Sr2	80.6 (4)
O2W—Sr2—C14	120.41 (16)	Sr4—C14—Sr2	98.1 (2)
O14—Sr2—Sr1	68.94 (11)	O9—C15—O10	123.4 (6)
O7—Sr2—Sr1	72.93 (12)	O9—C15—C16	118.6 (6)
O2^iii—Sr2—Sr1	133.87 (13)	O10—C15—C16	118.0 (7)
O5^iv—Sr2—Sr1	109.34 (11)	O9—C15—Sr3	59.5 (3)
N2—Sr2—Sr1	105.67 (12)	O10—C15—Sr3	63.9 (3)
O3—Sr2—Sr1	38.22 (12)	C16—C15—Sr3	177.8 (5)
O5—Sr2—Sr1	123.48 (11)	N3—C16—C17	121.7 (6)
O2W—Sr2—Sr1	37.20 (11)	N3—C16—C15	114.4 (6)
C14—Sr2—Sr1	83.75 (12)	C17—C16—C15	123.9 (6)
O14—Sr2—Sr2^iv	129.23 (12)	C18—C17—C16	119.0 (7)
O7—Sr2—Sr2^iv	155.26 (11)	C18—C17—H17	120.5
O2^iii—Sr2—Sr2^iv	105.76 (12)	C16—C17—H17	120.5
O5^iv—Sr2—Sr2^iv	35.78 (11)	C19—C18—C17	118.9 (7)
N2—Sr2—Sr2^iv	94.25 (13)	C19—C18—H18	120.6
O3—Sr2—Sr2^iv	91.06 (12)	C17—C18—H18	120.6
O5—Sr2—Sr2^iv	34.40 (9)	C18—C19—C20	119.5 (6)
O2W—Sr2—Sr2^iv	86.80 (12)	C18—C19—H19	120.2
C14—Sr2—Sr2^iv	138.34 (13)	C20—C19—H19	120.2
Sr1—Sr2—Sr2^iv	112.80 (2)	N3—C20—C19	123.0 (6)
O14—Sr2—Sr3	32.24 (11)	N3—C20—C21	113.9 (6)
O7—Sr2—Sr3	74.02 (11)	C19—C20—C21	123.1 (6)
O2^iii—Sr2—Sr3	35.27 (12)	O11—C21—O12	124.1 (6)
O5^iv—Sr2—Sr3	93.78 (11)	O11—C21—C20	119.3 (6)
N2—Sr2—Sr3	117.96 (12)	O12—C21—C20	116.6 (6)
O3—Sr2—Sr3	135.75 (12)	O11—C21—Sr4^i	46.2 (3)
O5—Sr2—Sr3	136.60 (11)	O12—C21—Sr4^i	79.8 (4)
O2W—Sr2—Sr3	95.40 (12)	C20—C21—Sr4^i	159.9 (5)
C14—Sr2—Sr3	85.18 (13)	C2—N1—C6	118.5 (6)
Sr1—Sr2—Sr3	99.41 (4)	C2—N1—Sr1	120.8 (5)
Sr2^iv—Sr2—Sr3	125.97 (3)	C6—N1—Sr1	120.6 (5)
O9^ii—Sr3—O9	147.6 (2)	C9—N2—C13	119.1 (6)
O9^ii—Sr3—O14^ii	77.82 (15)	C9—N2—Sr2	120.7 (4)
O9—Sr3—O14^ii	73.23 (15)	C13—N2—Sr2	119.1 (5)
O9^ii—Sr3—O14	73.23 (15)	C20—N3—C16	117.8 (6)
O9—Sr3—O14	77.82 (15)	C20—N3—Sr4	122.2 (4)
O14^ii—Sr3—O14	52.8 (2)	C16—N3—Sr4	120.0 (4)
O9^ii—Sr3—O10	155.58 (15)	C1—O1—Sr1	125.5 (5)
O9—Sr3—O10	49.32 (14)	C1—O1—Sr3^vii	95.7 (4)
O14^ii—Sr3—O10	103.13 (15)	Sr1—O1—Sr3^vii	137.0 (2)
O14—Sr3—O10	127.14 (14)	C1—O2—Sr2^vii	154.7 (5)
O9^ii—Sr3—O10^ii	49.32 (14)	C1—O2—Sr3^vii	91.8 (4)
O9—Sr3—O10^ii	155.58 (15)	Sr2^vii—O2—Sr3^vii	112.35 (18)
O14^ii—Sr3—O10^ii	127.14 (14)	C7—O3—Sr1	124.1 (5)
O14—Sr3—O10^ii	103.13 (15)	C7—O3—Sr2	127.3 (5)
O10—Sr3—O10^ii	124.7 (2)	Sr1—O3—Sr2	103.42 (18)
O9^ii—Sr3—O1^iii	116.42 (14)	C8—O5—Sr2^iv	122.5 (5)
O9—Sr3—O1^iii	86.90 (15)	C8—O5—Sr2	121.8 (5)
O14^ii—Sr3—O1^iii	155.73 (14)	Sr2^iv—O5—Sr2	109.82 (16)
O14—Sr3—O1^iii	110.12 (15)	C8—O6—Sr4^viii	160.6 (4)
O10—Sr3—O1^iii	72.33 (15)	C14—O7—Sr2	124.9 (5)
O10^ii—Sr3—O1^iii	69.70 (14)	C14—O7—Sr4	94.8 (4)
O9^ii—Sr3—O1^v	86.90 (14)	Sr2—O7—Sr4	140.29 (19)
O9—Sr3—O1^v	116.42 (14)	C14—O8—Sr4	92.5 (4)
O14^ii—Sr3—O1^v	110.12 (15)	C15—O9—Sr3	96.1 (4)
O14—Sr3—O1^v	155.73 (14)	C15—O9—Sr4	124.3 (4)
O10—Sr3—O1^v	69.70 (14)	Sr3—O9—Sr4	134.64 (19)
O10^ii—Sr3—O1^v	72.33 (15)	C15—O10—Sr3	91.2 (4)
O1^iii—Sr3—O1^v	91.0 (2)	C21—O11—Sr4	125.0 (4)
O9^ii—Sr3—O2^v	80.63 (15)	C21—O11—Sr4^i	114.2 (4)
O9—Sr3—O2^v	98.34 (15)	Sr4—O11—Sr4^i	116.85 (18)
O14^ii—Sr3—O2^v	62.66 (15)	C21—O12—Sr1^i	171.5 (5)
O14—Sr3—O2^v	113.72 (15)	S1—O13—Sr1	114.6 (3)
O10—Sr3—O2^v	78.41 (15)	S1—O13—Sr4	119.8 (3)
O10^ii—Sr3—O2^v	103.33 (15)	Sr1—O13—Sr4	117.98 (16)
O1^iii—Sr3—O2^v	135.99 (15)	S1—O14—Sr2	137.7 (3)
O1^v—Sr3—O2^v	47.58 (15)	S1—O14—Sr3	99.7 (3)
O9^ii—Sr3—O2^iii	98.34 (15)	Sr2—O14—Sr3	117.30 (18)
O9—Sr3—O2^iii	80.63 (15)	Sr1—O2W—Sr2	103.07 (16)
O14^ii—Sr3—O2^iii	113.72 (15)	Sr1—O2W—H2WB	118 (5)
O14—Sr3—O2^iii	62.66 (15)	Sr2—O2W—H2WB	116 (5)
O10—Sr3—O2^iii	103.33 (15)	Sr1—O2W—H2WA	119 (5)
O10^ii—Sr3—O2^iii	78.41 (15)	Sr2—O2W—H2WA	99 (5)
O1^iii—Sr3—O2^iii	47.58 (15)	H2WB—O2W—H2WA	101 (6)
O1^v—Sr3—O2^iii	135.99 (16)	Sr4—O1W—H1WB	105 (6)
O2^v—Sr3—O2^iii	176.4 (2)	Sr4—O1W—H1WA	108 (5)
O9^ii—Sr3—C15	164.67 (19)	H1WB—O1W—H1WA	93 (7)
O9—Sr3—C15	24.41 (17)	Sr1^ii—O3W—Sr1	99.58 (17)
O14^ii—Sr3—C15	87.77 (18)	Sr1^ii—O3W—H3WB	122 (5)
O14—Sr3—C15	102.23 (18)	Sr1—O3W—H3WB	101 (6)
O10—Sr3—C15	24.91 (16)	Sr1^ii—O3W—H3WA	110 (5)
O10^ii—Sr3—C15	144.82 (19)	Sr1—O3W—H3WA	107 (5)
O1^iii—Sr3—C15	78.91 (17)	H3WB—O3W—H3WA	114 (7)
O1^v—Sr3—C15	93.27 (18)	O14—S1—O14^ii	107.8 (4)
O2^v—Sr3—C15	88.17 (18)	O14—S1—O13^ii	112.8 (3)
O2^iii—Sr3—C15	92.18 (18)	O14^ii—S1—O13^ii	107.1 (3)
O9^ii—Sr3—C15^ii	24.41 (17)	O14—S1—O13	107.1 (3)
O9—Sr3—C15^ii	164.67 (19)	O14^ii—S1—O13	112.8 (3)
O14^ii—Sr3—C15^ii	102.23 (18)	O13^ii—S1—O13	109.3 (4)
O14—Sr3—C15^ii	87.77 (18)	O14—S1—Sr3	53.9 (2)
O10—Sr3—C15^ii	144.82 (19)	O14^ii—S1—Sr3	53.9 (2)
O10^ii—Sr3—C15^ii	24.91 (16)	O13^ii—S1—Sr3	125.4 (2)
O1^iii—Sr3—C15^ii	93.27 (18)	O13—S1—Sr3	125.4 (2)
O1^v—Sr3—C15^ii	78.91 (17)	O14—S1—Sr1^ii	152.4 (2)
O2^v—Sr3—C15^ii	92.18 (18)	O14^ii—S1—Sr1^ii	95.1 (2)
O2^iii—Sr3—C15^ii	88.17 (18)	O13—S1—Sr1^ii	76.6 (2)
C15—Sr3—C15^ii	168.9 (3)	O14—S1—Sr1	95.1 (2)
O9—Sr4—O7	72.47 (16)	O14^ii—S1—Sr1	152.4 (2)
O9—Sr4—O11	118.99 (15)	O13^ii—S1—Sr1	76.6 (2)
O7—Sr4—O11	122.27 (14)
O12^i—Sr1—Sr2—O14	97.37 (18)	O3—Sr2—O5—C8	57.9 (5)
O2W—Sr1—Sr2—O14	−75.8 (2)	O2W—Sr2—O5—C8	113.0 (5)
O1—Sr1—Sr2—O14	−147.9 (3)	C14—Sr2—O5—C8	−20.2 (5)
O3W^ii—Sr1—Sr2—O14	−54.73 (17)	Sr1—Sr2—O5—C8	71.6 (5)
O3—Sr1—Sr2—O14	175.1 (2)	Sr2^iv—Sr2—O5—C8	153.4 (6)
N1—Sr1—Sr2—O14	−167.38 (16)	Sr3—Sr2—O5—C8	−118.4 (5)
O3W—Sr1—Sr2—O14	30.31 (18)	O14—Sr2—O5—Sr2^iv	42.2 (5)
O13—Sr1—Sr2—O14	27.55 (16)	O7—Sr2—O5—Sr2^iv	−171.40 (17)
S1—Sr1—Sr2—O14	3.83 (12)	O2^iii—Sr2—O5—Sr2^iv	99.51 (18)
Sr1^ii—Sr1—Sr2—O14	−10.90 (12)	O5^iv—Sr2—O5—Sr2^iv	17.4 (2)
Sr4—Sr1—Sr2—O14	61.98 (12)	N2—Sr2—O5—Sr2^iv	−171.4 (2)
O12^i—Sr1—Sr2—O7	16.72 (18)	O3—Sr2—O5—Sr2^iv	−95.51 (18)
O2W—Sr1—Sr2—O7	−156.5 (2)	O2W—Sr2—O5—Sr2^iv	−40.4 (2)
O1—Sr1—Sr2—O7	131.5 (3)	C14—Sr2—O5—Sr2^iv	−173.64 (18)
O3W^ii—Sr1—Sr2—O7	−135.38 (17)	Sr1—Sr2—O5—Sr2^iv	−81.75 (17)
O3—Sr1—Sr2—O7	94.4 (2)	Sr3—Sr2—O5—Sr2^iv	88.21 (19)
N1—Sr1—Sr2—O7	111.97 (16)	O5—C8—O6—Sr4^viii	−174.6 (10)
O3W—Sr1—Sr2—O7	−50.35 (17)	C9—C8—O6—Sr4^viii	8 (2)
O13—Sr1—Sr2—O7	−53.10 (15)	O8—C14—O7—Sr2	−168.8 (5)
S1—Sr1—Sr2—O7	−76.83 (12)	C13—C14—O7—Sr2	12.1 (9)
Sr1^ii—Sr1—Sr2—O7	−91.56 (12)	Sr4—C14—O7—Sr2	−178.6 (5)
Sr4—Sr1—Sr2—O7	−18.67 (11)	O8—C14—O7—Sr4	9.7 (7)
O12^i—Sr1—Sr2—O2^iii	78.0 (2)	C13—C14—O7—Sr4	−169.4 (5)
O2W—Sr1—Sr2—O2^iii	−95.2 (2)	Sr2—C14—O7—Sr4	178.6 (5)
O1—Sr1—Sr2—O2^iii	−167.3 (3)	O14—Sr2—O7—C14	161.5 (6)
O3W^ii—Sr1—Sr2—O2^iii	−74.1 (2)	O2^iii—Sr2—O7—C14	93.1 (6)
O3—Sr1—Sr2—O2^iii	155.7 (2)	O5^iv—Sr2—O7—C14	130.8 (8)
N1—Sr1—Sr2—O2^iii	173.24 (18)	N2—Sr2—O7—C14	−7.2 (5)
O3W—Sr1—Sr2—O2^iii	10.9 (2)	O3—Sr2—O7—C14	−87.6 (6)
O13—Sr1—Sr2—O2^iii	8.17 (18)	O5—Sr2—O7—C14	−7.2 (6)
S1—Sr1—Sr2—O2^iii	−15.55 (15)	O2W—Sr2—O7—C14	−141.1 (6)
Sr1^ii—Sr1—Sr2—O2^iii	−30.28 (15)	Sr1—Sr2—O7—C14	−126.5 (6)
Sr4—Sr1—Sr2—O2^iii	42.60 (15)	Sr2^iv—Sr2—O7—C14	−18.9 (8)
O12^i—Sr1—Sr2—O5^iv	−175.91 (18)	Sr3—Sr2—O7—C14	128.1 (6)
O2W—Sr1—Sr2—O5^iv	10.9 (2)	O14—Sr2—O7—Sr4	−16.2 (3)
O1—Sr1—Sr2—O5^iv	−61.2 (3)	O2^iii—Sr2—O7—Sr4	−84.6 (3)
O3W^ii—Sr1—Sr2—O5^iv	31.99 (17)	O5^iv—Sr2—O7—Sr4	−46.9 (10)
O3—Sr1—Sr2—O5^iv	−98.2 (2)	N2—Sr2—O7—Sr4	175.0 (4)
N1—Sr1—Sr2—O5^iv	−80.66 (16)	O3—Sr2—O7—Sr4	94.6 (3)
O3W—Sr1—Sr2—O5^iv	117.02 (18)	O5—Sr2—O7—Sr4	175.0 (3)
O13—Sr1—Sr2—O5^iv	114.27 (15)	O2W—Sr2—O7—Sr4	41.1 (4)
S1—Sr1—Sr2—O5^iv	90.54 (12)	C14—Sr2—O7—Sr4	−177.7 (8)
Sr1^ii—Sr1—Sr2—O5^iv	75.81 (12)	Sr1—Sr2—O7—Sr4	55.8 (3)
Sr4—Sr1—Sr2—O5^iv	148.69 (12)	Sr2^iv—Sr2—O7—Sr4	163.36 (10)
O12^i—Sr1—Sr2—N2	−36.03 (19)	Sr3—Sr2—O7—Sr4	−49.7 (3)
O2W—Sr1—Sr2—N2	150.8 (2)	O9—Sr4—O7—C14	−107.0 (5)
O1—Sr1—Sr2—N2	78.7 (3)	O11—Sr4—O7—C14	6.7 (5)
O3W^ii—Sr1—Sr2—N2	171.87 (18)	O8—Sr4—O7—C14	−5.1 (4)
O3—Sr1—Sr2—N2	41.7 (2)	O11^i—Sr4—O7—C14	62.1 (4)
N1—Sr1—Sr2—N2	59.22 (17)	N3—Sr4—O7—C14	−57.9 (5)
O3W—Sr1—Sr2—N2	−103.09 (18)	O6^vi—Sr4—O7—C14	−144.4 (4)
O13—Sr1—Sr2—N2	−105.85 (16)	O1W—Sr4—O7—C14	116.0 (4)
S1—Sr1—Sr2—N2	−129.58 (13)	O13—Sr4—O7—C14	162.0 (5)
Sr1^ii—Sr1—Sr2—N2	−144.30 (13)	C21^i—Sr4—O7—C14	81.0 (4)
Sr4—Sr1—Sr2—N2	−71.42 (13)	Sr4^i—Sr4—O7—C14	37.0 (4)
O12^i—Sr1—Sr2—O3	−77.7 (2)	O9—Sr4—O7—Sr2	71.1 (3)
O2W—Sr1—Sr2—O3	109.1 (3)	O11—Sr4—O7—Sr2	−175.2 (3)
O1—Sr1—Sr2—O3	37.0 (3)	O8—Sr4—O7—Sr2	173.0 (4)
O3W^ii—Sr1—Sr2—O3	130.2 (2)	O11^i—Sr4—O7—Sr2	−119.8 (3)
N1—Sr1—Sr2—O3	17.5 (2)	N3—Sr4—O7—Sr2	120.3 (3)
O3W—Sr1—Sr2—O3	−144.8 (2)	O6^vi—Sr4—O7—Sr2	33.8 (5)
O13—Sr1—Sr2—O3	−147.5 (2)	O1W—Sr4—O7—Sr2	−65.8 (4)
S1—Sr1—Sr2—O3	−171.27 (17)	O13—Sr4—O7—Sr2	−19.9 (3)
Sr1^ii—Sr1—Sr2—O3	174.00 (17)	C14—Sr4—O7—Sr2	178.1 (7)
Sr4—Sr1—Sr2—O3	−113.12 (18)	C21^i—Sr4—O7—Sr2	−100.9 (4)
O12^i—Sr1—Sr2—O5	−100.30 (18)	Sr4^i—Sr4—O7—Sr2	−144.9 (3)
O2W—Sr1—Sr2—O5	86.5 (2)	O7—C14—O8—Sr4	−9.5 (7)
O1—Sr1—Sr2—O5	14.4 (3)	C13—C14—O8—Sr4	169.5 (6)
O3W^ii—Sr1—Sr2—O5	107.60 (17)	Sr2—C14—O8—Sr4	−28.2 (13)
O3—Sr1—Sr2—O5	−22.6 (2)	O9—Sr4—O8—C14	74.2 (4)
N1—Sr1—Sr2—O5	−5.05 (16)	O7—Sr4—O8—C14	5.1 (4)
O3W—Sr1—Sr2—O5	−167.37 (17)	O11—Sr4—O8—C14	−164.6 (4)
O13—Sr1—Sr2—O5	−170.12 (15)	O11^i—Sr4—O8—C14	−97.9 (4)
S1—Sr1—Sr2—O5	166.15 (11)	N3—Sr4—O8—C14	133.8 (4)
Sr1^ii—Sr1—Sr2—O5	151.42 (11)	O6^vi—Sr4—O8—C14	118.4 (4)
Sr4—Sr1—Sr2—O5	−135.69 (11)	O1W—Sr4—O8—C14	−109.2 (4)
O12^i—Sr1—Sr2—O2W	173.2 (2)	O13—Sr4—O8—C14	−9.1 (4)
O1—Sr1—Sr2—O2W	−72.1 (3)	C21^i—Sr4—O8—C14	−80.8 (4)
O3W^ii—Sr1—Sr2—O2W	21.1 (2)	Sr4^i—Sr4—O8—C14	−131.4 (4)
O3—Sr1—Sr2—O2W	−109.1 (3)	O10—C15—O9—Sr3	0.9 (8)
N1—Sr1—Sr2—O2W	−91.6 (2)	C16—C15—O9—Sr3	−178.7 (5)
O3W—Sr1—Sr2—O2W	106.1 (2)	O10—C15—O9—Sr4	159.1 (5)
O13—Sr1—Sr2—O2W	103.4 (2)	C16—C15—O9—Sr4	−20.5 (9)
S1—Sr1—Sr2—O2W	79.7 (2)	Sr3—C15—O9—Sr4	158.2 (5)
Sr1^ii—Sr1—Sr2—O2W	64.9 (2)	O9^ii—Sr3—O9—C15	152.0 (5)
Sr4—Sr1—Sr2—O2W	137.8 (2)	O14^ii—Sr3—O9—C15	124.4 (5)
O12^i—Sr1—Sr2—C14	2.64 (19)	O14—Sr3—O9—C15	178.9 (5)
O2W—Sr1—Sr2—C14	−170.6 (2)	O10—Sr3—O9—C15	−0.5 (4)
O1—Sr1—Sr2—C14	117.4 (3)	O10^ii—Sr3—O9—C15	−86.1 (6)
O3W^ii—Sr1—Sr2—C14	−149.46 (18)	O1^iii—Sr3—O9—C15	−69.7 (5)
O3—Sr1—Sr2—C14	80.4 (2)	O1^v—Sr3—O9—C15	19.9 (5)
N1—Sr1—Sr2—C14	97.88 (17)	O2^v—Sr3—O9—C15	66.4 (5)
O3W—Sr1—Sr2—C14	−64.43 (18)	O2^iii—Sr3—O9—C15	−117.2 (5)
O13—Sr1—Sr2—C14	−67.19 (16)	C15^ii—Sr3—O9—C15	−160.8 (6)
S1—Sr1—Sr2—C14	−90.91 (13)	O9^ii—Sr3—O9—Sr4	−2.5 (2)
Sr1^ii—Sr1—Sr2—C14	−105.64 (13)	O14^ii—Sr3—O9—Sr4	−30.1 (3)
Sr4—Sr1—Sr2—C14	−32.76 (13)	O14—Sr3—O9—Sr4	24.4 (3)
O12^i—Sr1—Sr2—Sr2^iv	−137.64 (14)	O10—Sr3—O9—Sr4	−155.0 (4)
O2W—Sr1—Sr2—Sr2^iv	49.16 (19)	O10^ii—Sr3—O9—Sr4	119.4 (4)
O1—Sr1—Sr2—Sr2^iv	−22.9 (2)	O1^iii—Sr3—O9—Sr4	135.8 (3)
O3W^ii—Sr1—Sr2—Sr2^iv	70.26 (13)	O1^v—Sr3—O9—Sr4	−134.6 (3)
O3—Sr1—Sr2—Sr2^iv	−59.92 (18)	O2^v—Sr3—O9—Sr4	−88.2 (3)
N1—Sr1—Sr2—Sr2^iv	−42.39 (12)	O2^iii—Sr3—O9—Sr4	88.3 (3)
O3W—Sr1—Sr2—Sr2^iv	155.29 (13)	C15—Sr3—O9—Sr4	−154.5 (6)
O13—Sr1—Sr2—Sr2^iv	152.54 (10)	C15^ii—Sr3—O9—Sr4	44.7 (9)
S1—Sr1—Sr2—Sr2^iv	128.81 (4)	O7—Sr4—O9—C15	138.5 (6)
Sr1^ii—Sr1—Sr2—Sr2^iv	114.08 (4)	O11—Sr4—O9—C15	20.8 (6)
Sr4—Sr1—Sr2—Sr2^iv	−173.04 (3)	O8—Sr4—O9—C15	90.4 (6)
O12^i—Sr1—Sr2—Sr3	86.67 (14)	O11^i—Sr4—O9—C15	109.8 (6)
O2W—Sr1—Sr2—Sr3	−86.53 (19)	N3—Sr4—O9—C15	14.9 (5)
O1—Sr1—Sr2—Sr3	−158.6 (2)	O6^vi—Sr4—O9—C15	−68.1 (6)
O3W^ii—Sr1—Sr2—Sr3	−65.43 (13)	O1W—Sr4—O9—C15	−86.4 (6)
O3—Sr1—Sr2—Sr3	164.39 (17)	O13—Sr4—O9—C15	−149.5 (6)
N1—Sr1—Sr2—Sr3	−178.08 (11)	C14—Sr4—O9—C15	114.6 (6)
O3W—Sr1—Sr2—Sr3	19.60 (13)	C21^i—Sr4—O9—C15	156.0 (5)
O13—Sr1—Sr2—Sr3	16.85 (10)	Sr4^i—Sr4—O9—C15	45.0 (7)
S1—Sr1—Sr2—Sr3	−6.878 (13)	O7—Sr4—O9—Sr3	−72.7 (3)
Sr1^ii—Sr1—Sr2—Sr3	−21.60 (3)	O11—Sr4—O9—Sr3	169.6 (2)
Sr4—Sr1—Sr2—Sr3	51.28 (3)	O8—Sr4—O9—Sr3	−120.8 (3)
O2—C1—C2—N1	−174.6 (6)	O11^i—Sr4—O9—Sr3	−101.4 (4)
O1—C1—C2—N1	3.5 (9)	N3—Sr4—O9—Sr3	163.6 (4)
O2—C1—C2—C3	4.7 (10)	O6^vi—Sr4—O9—Sr3	80.7 (3)
O1—C1—C2—C3	−177.3 (7)	O1W—Sr4—O9—Sr3	62.4 (4)
N1—C2—C3—C4	0.3 (13)	O13—Sr4—O9—Sr3	−0.7 (3)
C1—C2—C3—C4	−178.9 (8)	C14—Sr4—O9—Sr3	−96.6 (3)
C2—C3—C4—C5	−0.3 (14)	C21^i—Sr4—O9—Sr3	−55.2 (5)
C3—C4—C5—C6	0.9 (13)	Sr4^i—Sr4—O9—Sr3	−166.25 (12)
C4—C5—C6—N1	−1.5 (12)	O9—C15—O10—Sr3	−0.8 (8)
C4—C5—C6—C7	179.4 (7)	C16—C15—O10—Sr3	178.7 (6)
N1—C6—C7—O3	−0.5 (10)	O9^ii—Sr3—O10—C15	−142.7 (5)
C5—C6—C7—O3	178.7 (7)	O9—Sr3—O10—C15	0.4 (4)
N1—C6—C7—O4	179.2 (6)	O14^ii—Sr3—O10—C15	−53.3 (4)
C5—C6—C7—O4	−1.6 (10)	O14—Sr3—O10—C15	−0.3 (5)
O6—C8—C9—N2	170.6 (7)	O10^ii—Sr3—O10—C15	150.3 (4)
O5—C8—C9—N2	−7.5 (10)	O1^iii—Sr3—O10—C15	101.9 (4)
O6—C8—C9—C10	−5.9 (11)	O1^v—Sr3—O10—C15	−160.2 (4)
O5—C8—C9—C10	176.0 (7)	O2^v—Sr3—O10—C15	−111.4 (4)
N2—C9—C10—C11	4.1 (13)	O2^iii—Sr3—O10—C15	65.3 (4)
C8—C9—C10—C11	−179.6 (8)	C15^ii—Sr3—O10—C15	171.6 (3)
C9—C10—C11—C12	−3.4 (14)	O12—C21—O11—Sr4	175.5 (5)
C10—C11—C12—C13	−0.4 (15)	C20—C21—O11—Sr4	−5.6 (9)
C11—C12—C13—N2	3.9 (14)	Sr4^i—C21—O11—Sr4	156.9 (6)
C11—C12—C13—C14	−171.1 (8)	O12—C21—O11—Sr4^i	18.6 (9)
N2—C13—C14—O7	−10.1 (10)	C20—C21—O11—Sr4^i	−162.5 (5)
C12—C13—C14—O7	165.2 (8)	O9—Sr4—O11—C21	−2.5 (6)
N2—C13—C14—O8	170.8 (6)	O7—Sr4—O11—C21	−89.2 (6)
C12—C13—C14—O8	−13.9 (11)	O8—Sr4—O11—C21	−79.9 (5)
N2—C13—C14—Sr2	−2.6 (5)	O11^i—Sr4—O11—C21	−156.3 (6)
C12—C13—C14—Sr2	172.6 (8)	N3—Sr4—O11—C21	3.5 (5)
O9—Sr4—C14—O7	67.4 (4)	O6^vi—Sr4—O11—C21	70.8 (5)
O11—Sr4—C14—O7	−174.3 (4)	O1W—Sr4—O11—C21	134.8 (5)
O8—Sr4—C14—O7	170.8 (7)	O13—Sr4—O11—C21	155.2 (5)
O11^i—Sr4—C14—O7	−114.5 (4)	C14—Sr4—O11—C21	−86.4 (5)
N3—Sr4—C14—O7	126.1 (4)	C21^i—Sr4—O11—C21	−163.4 (5)
O6^vi—Sr4—C14—O7	61.8 (6)	Sr4^i—Sr4—O11—C21	−156.3 (6)
O1W—Sr4—C14—O7	−89.9 (5)	O9—Sr4—O11—Sr4^i	153.87 (18)
O13—Sr4—C14—O7	−17.1 (4)	O7—Sr4—O11—Sr4^i	67.2 (2)
C21^i—Sr4—C14—O7	−94.6 (4)	O8—Sr4—O11—Sr4^i	76.5 (2)
Sr4^i—Sr4—C14—O7	−144.7 (4)	O11^i—Sr4—O11—Sr4^i	0.0
O9—Sr4—C14—O8	−103.3 (4)	N3—Sr4—O11—Sr4^i	159.9 (3)
O7—Sr4—C14—O8	−170.8 (7)	O6^vi—Sr4—O11—Sr4^i	−132.91 (19)
O11—Sr4—C14—O8	14.9 (4)	O1W—Sr4—O11—Sr4^i	−68.9 (2)
O11^i—Sr4—C14—O8	74.7 (4)	O13—Sr4—O11—Sr4^i	−48.5 (4)
N3—Sr4—C14—O8	−44.6 (4)	C14—Sr4—O11—Sr4^i	70.0 (2)
O6^vi—Sr4—C14—O8	−109.0 (5)	C21^i—Sr4—O11—Sr4^i	−7.03 (19)
O1W—Sr4—C14—O8	99.4 (4)	O12^i—Sr1—O13—S1	−164.6 (3)
O13—Sr4—C14—O8	172.1 (4)	O2W—Sr1—O13—S1	−25.5 (3)
C21^i—Sr4—C14—O8	94.7 (4)	O1—Sr1—O13—S1	112.2 (3)
Sr4^i—Sr4—C14—O8	44.6 (4)	O3W^ii—Sr1—O13—S1	47.1 (3)
O9—Sr4—C14—Sr2	66.52 (17)	O3—Sr1—O13—S1	−84.5 (3)
O7—Sr4—C14—Sr2	−0.9 (3)	N1—Sr1—O13—S1	−104.7 (4)
O11—Sr4—C14—Sr2	−175.20 (16)	O3W—Sr1—O13—S1	117.5 (3)
O8—Sr4—C14—Sr2	169.9 (5)	Sr1^ii—Sr1—O13—S1	73.0 (3)
O11^i—Sr4—C14—Sr2	−115.43 (19)	Sr2—Sr1—O13—S1	−64.8 (3)
N3—Sr4—C14—Sr2	125.22 (17)	Sr4—Sr1—O13—S1	−149.5 (4)
O6^vi—Sr4—C14—Sr2	60.9 (4)	O12^i—Sr1—O13—Sr4	−15.1 (2)
O1W—Sr4—C14—Sr2	−90.8 (3)	O2W—Sr1—O13—Sr4	124.0 (2)
O13—Sr4—C14—Sr2	−18.04 (18)	O1—Sr1—O13—Sr4	−98.3 (2)
C21^i—Sr4—C14—Sr2	−95.45 (19)	O3W^ii—Sr1—O13—Sr4	−163.4 (2)
Sr4^i—Sr4—C14—Sr2	−145.58 (15)	O3—Sr1—O13—Sr4	65.0 (2)
O14—Sr2—C14—O7	−17.9 (6)	N1—Sr1—O13—Sr4	44.8 (5)
O2^iii—Sr2—C14—O7	−84.8 (6)	O3W—Sr1—O13—Sr4	−93.0 (2)
O5^iv—Sr2—C14—O7	−135.4 (7)	S1—Sr1—O13—Sr4	149.5 (4)
N2—Sr2—C14—O7	170.9 (7)	Sr1^ii—Sr1—O13—Sr4	−137.5 (2)
O3—Sr2—C14—O7	89.0 (6)	Sr2—Sr1—O13—Sr4	84.68 (18)
O5—Sr2—C14—O7	173.6 (6)	O9—Sr4—O13—S1	8.1 (3)
O2W—Sr2—C14—O7	44.0 (6)	O7—Sr4—O13—S1	81.1 (3)
Sr1—Sr2—C14—O7	50.6 (6)	O11—Sr4—O13—S1	−152.5 (3)
Sr2^iv—Sr2—C14—O7	168.2 (5)	O8—Sr4—O13—S1	92.4 (3)
Sr3—Sr2—C14—O7	−49.4 (6)	O11^i—Sr4—O13—S1	165.1 (3)
O14—Sr2—C14—O8	8.5 (13)	N3—Sr4—O13—S1	−14.3 (5)
O7—Sr2—C14—O8	26.4 (11)	O6^vi—Sr4—O13—S1	−63.9 (3)
O2^iii—Sr2—C14—O8	−58.4 (13)	O1W—Sr4—O13—S1	−131.6 (3)
O5^iv—Sr2—C14—O8	−109.0 (14)	C14—Sr4—O13—S1	88.6 (3)
N2—Sr2—C14—O8	−162.8 (14)	C21^i—Sr4—O13—S1	165.7 (3)
O3—Sr2—C14—O8	115.4 (13)	Sr4^i—Sr4—O13—S1	177.8 (2)
O5—Sr2—C14—O8	−160.0 (13)	O9—Sr4—O13—Sr1	−139.8 (2)
O2W—Sr2—C14—O8	70.4 (13)	O7—Sr4—O13—Sr1	−66.8 (2)
Sr1—Sr2—C14—O8	77.0 (13)	O11—Sr4—O13—Sr1	59.7 (4)
Sr2^iv—Sr2—C14—O8	−165.4 (12)	O8—Sr4—O13—Sr1	−55.5 (2)
Sr3—Sr2—C14—O8	−23.0 (13)	O11^i—Sr4—O13—Sr1	17.2 (2)
O14—Sr2—C14—C13	172.9 (4)	N3—Sr4—O13—Sr1	−162.2 (2)
O7—Sr2—C14—C13	−169.2 (8)	O6^vi—Sr4—O13—Sr1	148.2 (2)
O2^iii—Sr2—C14—C13	106.0 (4)	O1W—Sr4—O13—Sr1	80.5 (2)
O5^iv—Sr2—C14—C13	55.5 (9)	C14—Sr4—O13—Sr1	−59.3 (2)
N2—Sr2—C14—C13	1.7 (4)	C21^i—Sr4—O13—Sr1	17.8 (2)
O3—Sr2—C14—C13	−80.1 (4)	Sr4^i—Sr4—O13—Sr1	29.9 (3)
O5—Sr2—C14—C13	4.5 (4)	O7—Sr2—O14—S1	65.1 (4)
O2W—Sr2—C14—C13	−125.1 (4)	O2^iii—Sr2—O14—S1	153.1 (5)
Sr1—Sr2—C14—C13	−118.5 (4)	O5^iv—Sr2—O14—S1	−121.1 (4)
Sr2^iv—Sr2—C14—C13	−0.9 (5)	N2—Sr2—O14—S1	79.3 (5)
Sr3—Sr2—C14—C13	141.4 (4)	O3—Sr2—O14—S1	−8.7 (4)
O14—Sr2—C14—Sr4	−16.6 (2)	O5—Sr2—O14—S1	−144.0 (4)
O7—Sr2—C14—Sr4	1.3 (5)	O2W—Sr2—O14—S1	−52.2 (4)
O2^iii—Sr2—C14—Sr4	−83.5 (2)	C14—Sr2—O14—S1	70.6 (4)
O5^iv—Sr2—C14—Sr4	−134.1 (7)	Sr1—Sr2—O14—S1	−11.8 (4)
N2—Sr2—C14—Sr4	172.1 (3)	Sr2^iv—Sr2—O14—S1	−114.6 (4)
O3—Sr2—C14—Sr4	90.3 (2)	Sr3—Sr2—O14—S1	148.1 (6)
O5—Sr2—C14—Sr4	174.91 (17)	O7—Sr2—O14—Sr3	−82.9 (2)
O2W—Sr2—C14—Sr4	45.3 (3)	O2^iii—Sr2—O14—Sr3	5.06 (17)
Sr1—Sr2—C14—Sr4	51.91 (15)	O5^iv—Sr2—O14—Sr3	90.9 (2)
Sr2^iv—Sr2—C14—Sr4	169.51 (4)	N2—Sr2—O14—Sr3	−68.7 (3)
Sr3—Sr2—C14—Sr4	−48.13 (16)	O3—Sr2—O14—Sr3	−156.74 (18)
O9^ii—Sr3—C15—O9	−72.0 (10)	O5—Sr2—O14—Sr3	67.9 (5)
O14^ii—Sr3—C15—O9	−52.2 (4)	O2W—Sr2—O14—Sr3	159.7 (2)
O14—Sr3—C15—O9	−1.1 (5)	C14—Sr2—O14—Sr3	−77.5 (2)
O10—Sr3—C15—O9	179.2 (7)	Sr1—Sr2—O14—Sr3	−159.9 (2)
O10^ii—Sr3—C15—O9	134.3 (4)	Sr2^iv—Sr2—O14—Sr3	97.28 (18)
O1^iii—Sr3—C15—O9	107.4 (5)	O9^ii—Sr3—O14—S1	87.2 (2)
O1^v—Sr3—C15—O9	−162.3 (4)	O9—Sr3—O14—S1	−78.1 (2)
O2^v—Sr3—C15—O9	−114.9 (4)	O14^ii—Sr3—O14—S1	0.000 (1)
O2^iii—Sr3—C15—O9	61.4 (5)	O10—Sr3—O14—S1	−77.5 (3)
C15^ii—Sr3—C15—O9	153.1 (4)	O10^ii—Sr3—O14—S1	127.0 (2)
O9^ii—Sr3—C15—O10	108.8 (8)	O1^iii—Sr3—O14—S1	−160.1 (2)
O9—Sr3—C15—O10	−179.2 (7)	O1^v—Sr3—O14—S1	50.9 (5)
O14^ii—Sr3—C15—O10	128.6 (4)	O2^v—Sr3—O14—S1	15.8 (3)
O14—Sr3—C15—O10	179.8 (4)	O2^iii—Sr3—O14—S1	−163.7 (3)
O10^ii—Sr3—C15—O10	−44.9 (6)	C15—Sr3—O14—S1	−77.6 (3)
O1^iii—Sr3—C15—O10	−71.8 (4)	C15^ii—Sr3—O14—S1	107.2 (3)
O1^v—Sr3—C15—O10	18.6 (4)	O9^ii—Sr3—O14—Sr2	−113.9 (2)
O2^v—Sr3—C15—O10	65.9 (4)	O9—Sr3—O14—Sr2	80.8 (2)
O2^iii—Sr3—C15—O10	−117.7 (4)	O14^ii—Sr3—O14—Sr2	158.8 (4)
C15^ii—Sr3—C15—O10	−26.1 (4)	O10—Sr3—O14—Sr2	81.3 (2)
O9—C15—C16—N3	11.4 (10)	O10^ii—Sr3—O14—Sr2	−74.2 (2)
O10—C15—C16—N3	−168.2 (6)	O1^iii—Sr3—O14—Sr2	−1.3 (2)
O9—C15—C16—C17	−168.7 (8)	O1^v—Sr3—O14—Sr2	−150.3 (3)
O10—C15—C16—C17	11.7 (11)	O2^v—Sr3—O14—Sr2	174.63 (17)
N3—C16—C17—C18	−1.9 (12)	O2^iii—Sr3—O14—Sr2	−4.88 (17)
C15—C16—C17—C18	178.1 (7)	C15—Sr3—O14—Sr2	81.2 (2)
C16—C17—C18—C19	−0.1 (12)	C15^ii—Sr3—O14—Sr2	−94.0 (2)
C17—C18—C19—C20	2.4 (12)	O12^i—Sr1—O2W—Sr2	−8.9 (3)
C18—C19—C20—N3	−2.9 (12)	O1—Sr1—O2W—Sr2	149.80 (16)
C18—C19—C20—C21	178.7 (7)	O3W^ii—Sr1—O2W—Sr2	−159.4 (2)
N3—C20—C21—O11	4.1 (9)	O3—Sr1—O2W—Sr2	41.75 (17)
C19—C20—C21—O11	−177.4 (7)	N1—Sr1—O2W—Sr2	93.07 (19)
N3—C20—C21—O12	−176.9 (6)	O3W—Sr1—O2W—Sr2	−108.4 (2)
C19—C20—C21—O12	1.6 (11)	O13—Sr1—O2W—Sr2	−63.69 (17)
N3—C20—C21—Sr4^i	−35.0 (16)	S1—Sr1—O2W—Sr2	−74.48 (15)
C19—C20—C21—Sr4^i	143.5 (11)	Sr1^ii—Sr1—O2W—Sr2	−122.35 (15)
C3—C2—N1—C6	−0.9 (10)	Sr4—Sr1—O2W—Sr2	−38.08 (16)
C1—C2—N1—C6	178.4 (6)	O14—Sr2—O2W—Sr1	87.8 (2)
C3—C2—N1—Sr1	−177.4 (6)	O7—Sr2—O2W—Sr1	23.5 (2)
C1—C2—N1—Sr1	1.9 (8)	O2^iii—Sr2—O2W—Sr1	117.1 (2)
C5—C6—N1—C2	1.4 (10)	O5^iv—Sr2—O2W—Sr1	−169.2 (2)
C7—C6—N1—C2	−179.4 (6)	N2—Sr2—O2W—Sr1	−42.9 (3)
C5—C6—N1—Sr1	178.0 (5)	O3—Sr2—O2W—Sr1	−42.59 (18)
C7—C6—N1—Sr1	−2.9 (8)	O5—Sr2—O2W—Sr1	−114.20 (18)
O12^i—Sr1—N1—C2	−101.4 (5)	C14—Sr2—O2W—Sr1	10.9 (3)
O2W—Sr1—N1—C2	127.2 (5)	Sr2^iv—Sr2—O2W—Sr1	−135.69 (16)
O1—Sr1—N1—C2	−3.7 (4)	Sr3—Sr2—O2W—Sr1	98.46 (16)
O3W^ii—Sr1—N1—C2	52.7 (5)	O12^i—Sr1—O3W—Sr1^ii	−150.0 (2)
O3—Sr1—N1—C2	179.6 (5)	O2W—Sr1—O3W—Sr1^ii	−22.3 (3)
O3W—Sr1—N1—C2	−30.8 (6)	O1—Sr1—O3W—Sr1^ii	104.79 (17)
O13—Sr1—N1—C2	−157.2 (4)	O3W^ii—Sr1—O3W—Sr1^ii	28.8 (2)
S1—Sr1—N1—C2	150.9 (4)	O3—Sr1—O3W—Sr1^ii	−126.6 (3)
Sr1^ii—Sr1—N1—C2	26.2 (6)	N1—Sr1—O3W—Sr1^ii	129.05 (18)
Sr2—Sr1—N1—C2	167.1 (5)	O13—Sr1—O3W—Sr1^ii	−71.69 (16)
Sr4—Sr1—N1—C2	−128.9 (4)	S1—Sr1—O3W—Sr1^ii	−51.75 (12)
O12^i—Sr1—N1—C6	82.2 (5)	Sr2—Sr1—O3W—Sr1^ii	−74.43 (18)
O2W—Sr1—N1—C6	−49.3 (5)	Sr4—Sr1—O3W—Sr1^ii	−104.96 (16)
O1—Sr1—N1—C6	179.9 (5)	Sr2—O14—S1—O14^ii	−151.5 (5)
O3W^ii—Sr1—N1—C6	−123.7 (5)	Sr3—O14—S1—O14^ii	0.000 (2)
O3—Sr1—N1—C6	3.2 (4)	Sr2—O14—S1—O13^ii	90.4 (4)
O3W—Sr1—N1—C6	152.8 (4)	Sr3—O14—S1—O13^ii	−118.1 (3)
O13—Sr1—N1—C6	26.4 (7)	Sr2—O14—S1—O13	−29.9 (5)
S1—Sr1—N1—C6	−25.5 (6)	Sr3—O14—S1—O13	121.6 (3)
Sr1^ii—Sr1—N1—C6	−150.2 (4)	Sr2—O14—S1—Sr3	−151.5 (5)
Sr2—Sr1—N1—C6	−9.3 (5)	Sr2—O14—S1—Sr1^ii	64.0 (6)
Sr4—Sr1—N1—C6	54.7 (5)	Sr3—O14—S1—Sr1^ii	−144.4 (3)
C10—C9—N2—C13	−0.8 (11)	Sr2—O14—S1—Sr1	12.8 (4)
C8—C9—N2—C13	−177.2 (6)	Sr3—O14—S1—Sr1	164.31 (12)
C10—C9—N2—Sr2	167.2 (6)	Sr1—O13—S1—O14	79.0 (3)
C8—C9—N2—Sr2	−9.2 (9)	Sr4—O13—S1—O14	−69.9 (4)
C12—C13—N2—C9	−3.3 (11)	Sr1—O13—S1—O14^ii	−162.6 (3)
C14—C13—N2—C9	172.0 (6)	Sr4—O13—S1—O14^ii	48.5 (4)
C12—C13—N2—Sr2	−171.5 (6)	Sr1—O13—S1—O13^ii	−43.54 (14)
C14—C13—N2—Sr2	3.8 (8)	Sr4—O13—S1—O13^ii	167.5 (4)
O14—Sr2—N2—C9	177.3 (5)	Sr1—O13—S1—Sr3	136.46 (14)
O7—Sr2—N2—C9	−167.0 (6)	Sr4—O13—S1—Sr3	−12.5 (4)
O2^iii—Sr2—N2—C9	114.4 (5)	Sr1—O13—S1—Sr1^ii	−72.7 (2)
O5^iv—Sr2—N2—C9	23.2 (6)	Sr4—O13—S1—Sr1^ii	138.4 (3)
O3—Sr2—N2—C9	−82.0 (5)	Sr4—O13—S1—Sr1	−148.9 (4)
O5—Sr2—N2—C9	13.0 (5)	O9^ii—Sr3—S1—O14	−84.8 (3)
O2W—Sr2—N2—C9	−81.7 (6)	O9—Sr3—S1—O14	95.2 (3)
C14—Sr2—N2—C9	−170.1 (6)	O14^ii—Sr3—S1—O14	180.000 (2)
Sr1—Sr2—N2—C9	−107.0 (5)	O10—Sr3—S1—O14	118.5 (3)
Sr2^iv—Sr2—N2—C9	8.1 (5)	O10^ii—Sr3—S1—O14	−61.5 (3)
Sr3—Sr2—N2—C9	143.1 (5)	O1^iii—Sr3—S1—O14	26.6 (3)
O14—Sr2—N2—C13	−14.7 (6)	O1^v—Sr3—S1—O14	−153.4 (3)
O7—Sr2—N2—C13	1.0 (5)	O2^v—Sr3—S1—O14	−165.6 (2)
O2^iii—Sr2—N2—C13	−77.6 (5)	O2^iii—Sr3—S1—O14	14.4 (2)
O5^iv—Sr2—N2—C13	−168.8 (4)	C15—Sr3—S1—O14	106.4 (3)
O3—Sr2—N2—C13	86.0 (5)	C15^ii—Sr3—S1—O14	−73.6 (3)
O5—Sr2—N2—C13	−179.0 (5)	O9^ii—Sr3—S1—O14^ii	95.2 (3)
O2W—Sr2—N2—C13	86.3 (5)	O9—Sr3—S1—O14^ii	−84.8 (3)
C14—Sr2—N2—C13	−2.1 (4)	O14—Sr3—S1—O14^ii	180.000 (2)
Sr1—Sr2—N2—C13	61.0 (5)	O10—Sr3—S1—O14^ii	−61.5 (3)
Sr2^iv—Sr2—N2—C13	176.1 (5)	O10^ii—Sr3—S1—O14^ii	118.5 (3)
Sr3—Sr2—N2—C13	−49.0 (5)	O1^iii—Sr3—S1—O14^ii	−153.4 (3)
C19—C20—N3—C16	1.0 (10)	O1^v—Sr3—S1—O14^ii	26.6 (3)
C21—C20—N3—C16	179.4 (6)	O2^v—Sr3—S1—O14^ii	14.4 (2)
C19—C20—N3—Sr4	−179.5 (6)	O2^iii—Sr3—S1—O14^ii	−165.6 (2)
C21—C20—N3—Sr4	−1.0 (8)	C15—Sr3—S1—O14^ii	−73.6 (3)
C17—C16—N3—C20	1.5 (10)	C15^ii—Sr3—S1—O14^ii	106.4 (3)
C15—C16—N3—C20	−178.6 (6)	O9^ii—Sr3—S1—O13^ii	9.2 (3)
C17—C16—N3—Sr4	−178.1 (6)	O9—Sr3—S1—O13^ii	−170.8 (3)
C15—C16—N3—Sr4	1.9 (7)	O14^ii—Sr3—S1—O13^ii	−86.0 (3)
O9—Sr4—N3—C20	173.0 (6)	O14—Sr3—S1—O13^ii	94.0 (3)
O7—Sr4—N3—C20	116.5 (5)	O10—Sr3—S1—O13^ii	−147.4 (3)
O11—Sr4—N3—C20	−0.9 (5)	O10^ii—Sr3—S1—O13^ii	32.6 (3)
O8—Sr4—N3—C20	77.9 (5)	O1^iii—Sr3—S1—O13^ii	120.6 (3)
O11^i—Sr4—N3—C20	19.7 (6)	O1^v—Sr3—S1—O13^ii	−59.4 (3)
O6^vi—Sr4—N3—C20	−110.0 (5)	O2^v—Sr3—S1—O13^ii	−71.5 (3)
O1W—Sr4—N3—C20	−58.5 (5)	O2^iii—Sr3—S1—O13^ii	108.5 (3)
O13—Sr4—N3—C20	−161.0 (5)	C15—Sr3—S1—O13^ii	−159.5 (3)
C14—Sr4—N3—C20	95.7 (5)	C15^ii—Sr3—S1—O13^ii	20.5 (3)
C21^i—Sr4—N3—C20	19.0 (6)	O9^ii—Sr3—S1—O13	−170.8 (3)
Sr4^i—Sr4—N3—C20	9.5 (5)	O9—Sr3—S1—O13	9.2 (3)
O9—Sr4—N3—C16	−7.4 (4)	O14^ii—Sr3—S1—O13	94.0 (3)
O7—Sr4—N3—C16	−63.9 (5)	O14—Sr3—S1—O13	−86.0 (3)
O11—Sr4—N3—C16	178.6 (5)	O10—Sr3—S1—O13	32.6 (3)
O8—Sr4—N3—C16	−102.5 (5)	O10^ii—Sr3—S1—O13	−147.4 (3)
O11^i—Sr4—N3—C16	−160.7 (4)	O1^iii—Sr3—S1—O13	−59.4 (3)
O6^vi—Sr4—N3—C16	69.6 (5)	O1^v—Sr3—S1—O13	120.6 (3)
O1W—Sr4—N3—C16	121.1 (5)	O2^v—Sr3—S1—O13	108.5 (3)
O13—Sr4—N3—C16	18.6 (6)	O2^iii—Sr3—S1—O13	−71.5 (3)
C14—Sr4—N3—C16	−84.7 (5)	C15—Sr3—S1—O13	20.5 (3)
C21^i—Sr4—N3—C16	−161.4 (4)	C15^ii—Sr3—S1—O13	−159.5 (3)
Sr4^i—Sr4—N3—C16	−171.0 (5)	O9^ii—Sr3—S1—Sr1^ii	66.60 (12)
O2—C1—O1—Sr1	170.2 (5)	O9—Sr3—S1—Sr1^ii	−113.40 (12)
C2—C1—O1—Sr1	−7.7 (8)	O14^ii—Sr3—S1—Sr1^ii	−28.6 (2)
Sr3^vii—C1—O1—Sr1	166.8 (5)	O14—Sr3—S1—Sr1^ii	151.4 (2)
O2—C1—O1—Sr3^vii	3.5 (8)	O10—Sr3—S1—Sr1^ii	−90.07 (12)
C2—C1—O1—Sr3^vii	−174.4 (5)	O10^ii—Sr3—S1—Sr1^ii	89.93 (12)
O12^i—Sr1—O1—C1	96.8 (5)	O1^iii—Sr3—S1—Sr1^ii	177.96 (13)
O2W—Sr1—O1—C1	−66.9 (5)	O1^v—Sr3—S1—Sr1^ii	−2.04 (13)
O3W^ii—Sr1—O1—C1	−118.0 (5)	O2^v—Sr3—S1—Sr1^ii	−14.18 (10)
O3—Sr1—O1—C1	9.4 (6)	O2^iii—Sr3—S1—Sr1^ii	165.82 (10)
N1—Sr1—O1—C1	6.1 (5)	C15—Sr3—S1—Sr1^ii	−102.16 (15)
O3W—Sr1—O1—C1	165.1 (5)	C15^ii—Sr3—S1—Sr1^ii	77.84 (15)
O13—Sr1—O1—C1	170.1 (5)	O9^ii—Sr3—S1—Sr1	−113.40 (12)
S1—Sr1—O1—C1	−154.7 (4)	O9—Sr3—S1—Sr1	66.60 (12)
Sr1^ii—Sr1—O1—C1	−156.8 (5)	O14^ii—Sr3—S1—Sr1	151.4 (2)
Sr2—Sr1—O1—C1	−16.3 (7)	O14—Sr3—S1—Sr1	−28.6 (2)
Sr4—Sr1—O1—C1	124.1 (5)	O10—Sr3—S1—Sr1	89.93 (12)
O12^i—Sr1—O1—Sr3^vii	−102.8 (3)	O10^ii—Sr3—S1—Sr1	−90.07 (12)
O2W—Sr1—O1—Sr3^vii	93.5 (3)	O1^iii—Sr3—S1—Sr1	−2.04 (13)
O3W^ii—Sr1—O1—Sr3^vii	42.4 (2)	O1^v—Sr3—S1—Sr1	177.96 (13)
O3—Sr1—O1—Sr3^vii	169.8 (2)	O2^v—Sr3—S1—Sr1	165.82 (10)
N1—Sr1—O1—Sr3^vii	166.6 (3)	O2^iii—Sr3—S1—Sr1	−14.18 (10)
O3W—Sr1—O1—Sr3^vii	−34.4 (2)	C15—Sr3—S1—Sr1	77.84 (15)
O13—Sr1—O1—Sr3^vii	−29.5 (4)	C15^ii—Sr3—S1—Sr1	−102.16 (15)
S1—Sr1—O1—Sr3^vii	5.8 (4)	O12^i—Sr1—S1—O14	−95.0 (2)
Sr1^ii—Sr1—O1—Sr3^vii	3.7 (2)	O2W—Sr1—S1—O14	40.9 (2)
Sr2—Sr1—O1—Sr3^vii	144.15 (17)	O1—Sr1—S1—O14	154.6 (2)
Sr4—Sr1—O1—Sr3^vii	−75.5 (3)	O3W^ii—Sr1—S1—O14	118.9 (2)
O1—C1—O2—Sr2^vii	160.4 (7)	O3—Sr1—S1—O14	−11.6 (2)
C2—C1—O2—Sr2^vii	−21.7 (15)	N1—Sr1—S1—O14	13.1 (3)
Sr3^vii—C1—O2—Sr2^vii	163.7 (11)	O3W—Sr1—S1—O14	−165.6 (2)
O1—C1—O2—Sr3^vii	−3.3 (7)	O13—Sr1—S1—O14	−109.7 (3)
C2—C1—O2—Sr3^vii	174.6 (5)	Sr1^ii—Sr1—S1—O14	157.15 (19)
O4—C7—O3—Sr1	−175.9 (5)	Sr2—Sr1—S1—O14	−6.19 (19)
C6—C7—O3—Sr1	3.8 (9)	Sr4—Sr1—S1—O14	−89.98 (19)
O4—C7—O3—Sr2	−25.6 (10)	O12^i—Sr1—S1—O14^ii	51.2 (5)
C6—C7—O3—Sr2	154.2 (5)	O2W—Sr1—S1—O14^ii	−172.9 (5)
O12^i—Sr1—O3—C7	−103.6 (5)	O1—Sr1—S1—O14^ii	−59.2 (5)
O2W—Sr1—O3—C7	112.9 (6)	O3W^ii—Sr1—S1—O14^ii	−94.9 (5)
O1—Sr1—O3—C7	−6.9 (6)	O3—Sr1—S1—O14^ii	134.6 (4)
O3W^ii—Sr1—O3—C7	85.7 (6)	N1—Sr1—S1—O14^ii	159.3 (5)
N1—Sr1—O3—C7	−3.7 (5)	O3W—Sr1—S1—O14^ii	−19.4 (4)
O3W—Sr1—O3—C7	−125.9 (6)	O13—Sr1—S1—O14^ii	36.5 (5)
O13—Sr1—O3—C7	−174.5 (5)	Sr1^ii—Sr1—S1—O14^ii	−56.6 (4)
S1—Sr1—O3—C7	163.5 (5)	Sr2—Sr1—S1—O14^ii	140.0 (4)
Sr1^ii—Sr1—O3—C7	145.2 (4)	Sr4—Sr1—S1—O14^ii	56.2 (4)
Sr2—Sr1—O3—C7	156.2 (6)	O12^i—Sr1—S1—O13^ii	152.7 (3)
Sr4—Sr1—O3—C7	−146.4 (5)	O2W—Sr1—S1—O13^ii	−71.4 (2)
O12^i—Sr1—O3—Sr2	100.23 (19)	O1—Sr1—S1—O13^ii	42.4 (3)
O2W—Sr1—O3—Sr2	−43.30 (16)	O3W^ii—Sr1—S1—O13^ii	6.7 (2)
O1—Sr1—O3—Sr2	−163.11 (14)	O3—Sr1—S1—O13^ii	−123.9 (2)
O3W^ii—Sr1—O3—Sr2	−70.4 (3)	N1—Sr1—S1—O13^ii	−99.1 (3)
N1—Sr1—O3—Sr2	−159.8 (2)	O3W—Sr1—S1—O13^ii	82.2 (2)
O3W—Sr1—O3—Sr2	77.9 (4)	O13—Sr1—S1—O13^ii	138.1 (3)
O13—Sr1—O3—Sr2	29.31 (17)	Sr1^ii—Sr1—S1—O13^ii	44.9 (2)
S1—Sr1—O3—Sr2	7.36 (15)	Sr2—Sr1—S1—O13^ii	−118.4 (2)
Sr1^ii—Sr1—O3—Sr2	−11.0 (3)	Sr4—Sr1—S1—O13^ii	157.8 (2)
Sr4—Sr1—O3—Sr2	57.46 (13)	O12^i—Sr1—S1—O13	14.7 (3)
O14—Sr2—O3—C7	−159.9 (5)	O2W—Sr1—S1—O13	150.6 (3)
O7—Sr2—O3—C7	129.0 (6)	O1—Sr1—S1—O13	−95.7 (3)
O2^iii—Sr2—O3—C7	131.3 (6)	O3W^ii—Sr1—S1—O13	−131.4 (3)
O5^iv—Sr2—O3—C7	−59.0 (6)	O3—Sr1—S1—O13	98.1 (3)
N2—Sr2—O3—C7	66.1 (5)	N1—Sr1—S1—O13	122.8 (4)
O5—Sr2—O3—C7	6.2 (5)	O3W—Sr1—S1—O13	−55.9 (3)
O2W—Sr2—O3—C7	−113.7 (6)	Sr1^ii—Sr1—S1—O13	−93.2 (3)
C14—Sr2—O3—C7	111.2 (6)	Sr2—Sr1—S1—O13	103.5 (3)
Sr1—Sr2—O3—C7	−155.1 (6)	Sr4—Sr1—S1—O13	19.7 (3)
Sr2^iv—Sr2—O3—C7	−28.0 (5)	O12^i—Sr1—S1—Sr3	−72.16 (14)
Sr3—Sr2—O3—C7	−177.5 (5)	O2W—Sr1—S1—Sr3	63.74 (13)
O14—Sr2—O3—Sr1	−4.8 (2)	O1—Sr1—S1—Sr3	177.48 (16)
O7—Sr2—O3—Sr1	−75.88 (18)	O3W^ii—Sr1—S1—Sr3	141.76 (12)
O2^iii—Sr2—O3—Sr1	−73.6 (5)	O3—Sr1—S1—Sr3	11.23 (11)
O5^iv—Sr2—O3—Sr1	96.07 (19)	N1—Sr1—S1—Sr3	36.0 (3)
N2—Sr2—O3—Sr1	−138.8 (2)	O3W—Sr1—S1—Sr3	−142.72 (11)
O5—Sr2—O3—Sr1	161.30 (17)	O13—Sr1—S1—Sr3	−86.8 (3)
O2W—Sr2—O3—Sr1	41.41 (16)	Sr1^ii—Sr1—S1—Sr3	180.0
C14—Sr2—O3—Sr1	−93.70 (19)	Sr2—Sr1—S1—Sr3	16.66 (2)
Sr2^iv—Sr2—O3—Sr1	127.07 (14)	Sr4—Sr1—S1—Sr3	−67.13 (3)
Sr3—Sr2—O3—Sr1	−22.4 (2)	O12^i—Sr1—S1—Sr1^ii	107.84 (14)
O6—C8—O5—Sr2^iv	−7.2 (11)	O2W—Sr1—S1—Sr1^ii	−116.26 (13)
C9—C8—O5—Sr2^iv	170.7 (4)	O1—Sr1—S1—Sr1^ii	−2.52 (16)
O6—C8—O5—Sr2	−157.3 (6)	O3W^ii—Sr1—S1—Sr1^ii	−38.24 (12)
C9—C8—O5—Sr2	20.7 (8)	O3—Sr1—S1—Sr1^ii	−168.77 (11)
O14—Sr2—O5—C8	−164.4 (5)	N1—Sr1—S1—Sr1^ii	−144.0 (3)
O7—Sr2—O5—C8	−18.0 (6)	O3W—Sr1—S1—Sr1^ii	37.28 (11)
O2^iii—Sr2—O5—C8	−107.1 (5)	O13—Sr1—S1—Sr1^ii	93.2 (3)
O5^iv—Sr2—O5—C8	170.8 (5)	Sr2—Sr1—S1—Sr1^ii	−163.34 (2)
N2—Sr2—O5—C8	−18.0 (5)	Sr4—Sr1—S1—Sr1^ii	112.87 (3)

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

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
O3W—H3WA···O1W	0.83 (2)	2.23 (2)	3.058 (7)	174 (7)
O1W—H1WB···O4^vi	0.83 (2)	2.23 (4)	2.946 (8)	145 (7)
O1W—H1WB···O6^vi	0.83 (2)	2.55 (7)	2.961 (8)	112 (6)
O1W—H1WA···O8^i	0.83 (2)	1.93 (2)	2.755 (7)	174 (7)
O3W—H3WB···O10^vii	0.83 (2)	1.89 (3)	2.685 (7)	162 (8)
O2W—H2WB···O4^iv	0.85 (2)	1.84 (3)	2.653 (7)	161 (7)
O2W—H2WA···O6^iv	0.83 (2)	2.21 (6)	2.812 (7)	130 (7)
O2W—H2WA···O13^ii	0.83 (2)	2.36 (6)	2.950 (8)	128 (6)

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