Iodo­triphenyl­tin(IV): a monoclinic polymorph

A monoclinic polymorph of the title compound, [Sn(C₆H₅)₃I], complements the previously reported triclinic variant [Ng (1995). Acta Cryst. C51, 629-631; Simard & Wharf (1994). Acta Cryst. C50, 397-403]. There are two molecules in the asymmetric unit; in both cases, the Sn atom adopts a distorted SnIC₃ tetra­hedral environment.

Key indicators

• Single-crystal X-ray study
• T = 295 K
• Mean [sigma](C-C) = 0.011 Å
• R factor = 0.046
• wR factor = 0.133
• Data-to-parameter ratio = 18.9

checkCIF/PLATON results

No syntax errors found



Alert level B
PLAT232_ALERT_2_B Hirshfeld Test Diff (M-X)  I1A    -   Sn1A    ..      14.97 su
PLAT232_ALERT_2_B Hirshfeld Test Diff (M-X)  I1B    -   Sn1B    ..      12.74 su

Alert level C
PLAT062_ALERT_4_C Rescale T(min) & T(max) by .....................       0.99
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for       Sn1B
PLAT342_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ...         11

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

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

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Computing details

Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97.

Iodotriphenyltin(IV)

Crystal data

[Sn(C6H5)3I]	F(000) = 1808
Mr = 476.91	Dx = 1.825 Mg m^−3
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 5943 reflections
a = 19.343 (2) Å	θ = 2.2–23.6°
b = 9.9221 (12) Å	µ = 3.24 mm^−1
c = 18.996 (2) Å	T = 295 K
β = 107.798 (2)°	Plate, colorless
V = 3471.4 (7) Å^3	0.22 × 0.22 × 0.08 mm
Z = 8

Data collection

Bruker SMART APEX area-detector diffractometer	6820 independent reflections
Radiation source: fine-focus sealed tube	5225 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.041
φ and ω scans	θmax = 26.0°, θmin = 1.1°
Absorption correction: multi-scan (SADABS; Bruker, 2002)	h = −23→23
Tmin = 0.536, Tmax = 0.782	k = −12→12
26412 measured reflections	l = −23→23

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)] = 0.046	Hydrogen site location: inferred from neighbouring sites
wR(F^2) = 0.133	H-atom parameters constrained
S = 1.04	w = 1/[σ^2(Fo^2) + (0.0624P)^2 + 6.9063P] where P = (Fo^2 + 2Fc^2)/3
6820 reflections	(Δ/σ)max < 0.001
361 parameters	Δρmax = 0.91 e Å^−3
0 restraints	Δρmin = −1.37 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
Sn1a	0.44498 (2)	0.69125 (4)	0.30628 (2)	0.04574 (14)
I1a	0.39454 (4)	0.47739 (6)	0.36218 (4)	0.0912 (2)
C1a	0.5591 (3)	0.6724 (6)	0.3482 (3)	0.0464 (14)
C2a	0.6023 (4)	0.6768 (7)	0.3022 (4)	0.0588 (17)
H2a	0.5811	0.6883	0.2516	0.071*
C3a	0.6773 (4)	0.6642 (8)	0.3313 (5)	0.075 (2)
H3a	0.7062	0.6690	0.3001	0.090*
C4a	0.7087 (4)	0.6447 (8)	0.4052 (5)	0.069 (2)
H4a	0.7589	0.6367	0.4243	0.083*
C5a	0.6671 (4)	0.6369 (8)	0.4511 (4)	0.069 (2)
H5a	0.6889	0.6209	0.5012	0.082*
C6a	0.5920 (4)	0.6528 (7)	0.4236 (4)	0.0596 (17)
H6a	0.5640	0.6503	0.4556	0.072*
C7a	0.4035 (3)	0.6717 (6)	0.1896 (4)	0.0472 (15)
C8a	0.4106 (4)	0.7776 (8)	0.1460 (4)	0.0654 (19)
H8a	0.4322	0.8570	0.1682	0.079*
C9a	0.3862 (6)	0.7687 (9)	0.0699 (5)	0.090 (3)
H9a	0.3915	0.8412	0.0409	0.108*
C10a	0.3539 (5)	0.6500 (11)	0.0371 (5)	0.090 (3)
H10a	0.3373	0.6426	−0.0141	0.108*
C11a	0.3467 (5)	0.5468 (9)	0.0792 (5)	0.081 (3)
H11a	0.3247	0.4679	0.0568	0.097*
C12a	0.3711 (4)	0.5547 (7)	0.1554 (4)	0.0643 (19)
H12a	0.3658	0.4813	0.1838	0.077*
C13a	0.4053 (3)	0.8679 (6)	0.3433 (3)	0.0487 (15)
C14a	0.4511 (4)	0.9626 (7)	0.3862 (4)	0.0578 (17)
H14a	0.5010	0.9488	0.4002	0.069*
C15a	0.4241 (5)	1.0767 (7)	0.4085 (5)	0.070 (2)
H15a	0.4558	1.1399	0.4375	0.084*
C16a	0.3521 (5)	1.0983 (7)	0.3889 (4)	0.068 (2)
H16a	0.3343	1.1769	0.4037	0.081*
C17a	0.3050 (4)	1.0056 (8)	0.3475 (4)	0.065 (2)
H17a	0.2552	1.0208	0.3343	0.078*
C18a	0.3309 (3)	0.8903 (7)	0.3252 (4)	0.0554 (16)
H18a	0.2986	0.8264	0.2979	0.067*
Sn1b	0.04815 (2)	0.44099 (4)	0.67576 (2)	0.04785 (14)
I1b	0.09493 (4)	0.23573 (7)	0.61200 (5)	0.1068 (3)
C1b	−0.0661 (3)	0.4204 (6)	0.6431 (3)	0.0474 (14)
C2b	−0.1071 (4)	0.4026 (7)	0.5694 (4)	0.0615 (18)
H2b	−0.0847	0.4037	0.5326	0.074*
C3b	−0.1810 (4)	0.3835 (8)	0.5514 (4)	0.071 (2)
H3b	−0.2080	0.3705	0.5021	0.085*
C4b	−0.2151 (4)	0.3831 (8)	0.6039 (5)	0.075 (2)
H4b	−0.2651	0.3704	0.5907	0.090*
C5b	−0.1759 (4)	0.4016 (8)	0.6760 (5)	0.072 (2)
H5b	−0.1992	0.4019	0.7122	0.086*
C6b	−0.1020 (4)	0.4199 (7)	0.6957 (4)	0.0589 (17)
H6b	−0.0758	0.4320	0.7452	0.071*
C7b	0.0894 (3)	0.6190 (7)	0.6415 (3)	0.0496 (15)
C8b	0.1637 (4)	0.6330 (8)	0.6536 (4)	0.0617 (18)
H8b	0.1948	0.5619	0.6737	0.074*
C9b	0.1910 (4)	0.7497 (9)	0.6363 (4)	0.072 (2)
H9b	0.2408	0.7583	0.6455	0.087*
C10b	0.1469 (5)	0.8541 (9)	0.6058 (4)	0.079 (2)
H10b	0.1660	0.9345	0.5947	0.095*
C11b	0.0744 (5)	0.8389 (9)	0.5917 (5)	0.084 (3)
H11b	0.0436	0.9088	0.5689	0.101*
C12b	0.0454 (4)	0.7259 (8)	0.6097 (4)	0.0658 (19)
H12b	−0.0045	0.7197	0.6006	0.079*
C13b	0.0961 (3)	0.4128 (7)	0.7920 (4)	0.0500 (15)
C14b	0.1260 (4)	0.2914 (7)	0.8220 (4)	0.0636 (19)
H14b	0.1252	0.2179	0.7914	0.076*
C15b	0.1573 (4)	0.2790 (9)	0.8979 (5)	0.074 (2)
H15b	0.1770	0.1970	0.9181	0.088*
C16b	0.1592 (5)	0.3849 (10)	0.9420 (5)	0.082 (3)
H16b	0.1801	0.3753	0.9928	0.099*
C17b	0.1308 (6)	0.5082 (10)	0.9137 (5)	0.089 (3)
H17b	0.1333	0.5818	0.9447	0.107*
C18b	0.0984 (4)	0.5199 (8)	0.8379 (4)	0.070 (2)
H18b	0.0780	0.6017	0.8182	0.084*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Sn1a	0.0427 (2)	0.0465 (3)	0.0477 (3)	0.00697 (18)	0.01339 (19)	0.00215 (18)
I1a	0.0996 (5)	0.0749 (4)	0.1188 (5)	0.0068 (3)	0.0625 (4)	0.0240 (3)
C1a	0.044 (3)	0.041 (3)	0.050 (4)	0.005 (3)	0.007 (3)	−0.001 (3)
C2a	0.060 (4)	0.065 (4)	0.054 (4)	0.007 (3)	0.022 (3)	−0.004 (3)
C3a	0.056 (4)	0.092 (6)	0.084 (6)	0.004 (4)	0.035 (4)	−0.015 (5)
C4a	0.041 (4)	0.080 (5)	0.078 (5)	0.007 (4)	0.005 (4)	−0.020 (4)
C5a	0.057 (4)	0.087 (6)	0.052 (4)	0.009 (4)	0.001 (3)	0.000 (4)
C6a	0.058 (4)	0.068 (5)	0.052 (4)	0.009 (3)	0.015 (3)	−0.001 (3)
C7a	0.036 (3)	0.047 (4)	0.056 (4)	0.005 (3)	0.009 (3)	−0.006 (3)
C8a	0.079 (5)	0.054 (4)	0.059 (5)	0.000 (4)	0.014 (4)	0.000 (3)
C9a	0.122 (8)	0.080 (6)	0.057 (5)	0.019 (6)	0.011 (5)	0.010 (4)
C10a	0.096 (7)	0.107 (8)	0.050 (5)	0.042 (6)	−0.002 (4)	−0.016 (5)
C11a	0.078 (6)	0.066 (5)	0.079 (6)	0.009 (4)	−0.007 (5)	−0.036 (5)
C12a	0.059 (4)	0.052 (4)	0.078 (5)	0.004 (3)	0.015 (4)	−0.010 (4)
C13a	0.052 (4)	0.050 (4)	0.043 (3)	0.010 (3)	0.014 (3)	0.008 (3)
C14a	0.051 (4)	0.056 (4)	0.064 (4)	−0.005 (3)	0.014 (3)	−0.005 (3)
C15a	0.082 (6)	0.051 (4)	0.081 (5)	−0.018 (4)	0.029 (4)	−0.018 (4)
C16a	0.090 (6)	0.043 (4)	0.080 (5)	0.011 (4)	0.042 (5)	0.000 (4)
C17a	0.064 (5)	0.067 (5)	0.071 (5)	0.028 (4)	0.029 (4)	0.012 (4)
C18a	0.040 (3)	0.060 (4)	0.059 (4)	0.003 (3)	0.004 (3)	−0.007 (3)
Sn1b	0.0422 (2)	0.0473 (3)	0.0536 (3)	−0.00332 (18)	0.01407 (19)	−0.00167 (19)
I1b	0.0973 (5)	0.0939 (5)	0.1437 (7)	−0.0028 (4)	0.0581 (5)	−0.0442 (4)
C1b	0.046 (3)	0.041 (3)	0.052 (4)	−0.001 (3)	0.010 (3)	0.001 (3)
C2b	0.060 (4)	0.072 (5)	0.054 (4)	0.005 (4)	0.019 (3)	−0.009 (3)
C3b	0.051 (4)	0.085 (6)	0.065 (5)	0.000 (4)	0.003 (4)	−0.013 (4)
C4b	0.043 (4)	0.086 (6)	0.090 (6)	−0.011 (4)	0.013 (4)	−0.008 (5)
C5b	0.059 (5)	0.083 (5)	0.085 (6)	−0.008 (4)	0.039 (4)	0.006 (4)
C6b	0.062 (4)	0.059 (4)	0.055 (4)	−0.004 (3)	0.017 (3)	0.001 (3)
C7b	0.050 (4)	0.053 (4)	0.044 (3)	−0.005 (3)	0.013 (3)	−0.004 (3)
C8b	0.052 (4)	0.067 (5)	0.062 (4)	−0.008 (3)	0.011 (3)	0.005 (4)
C9b	0.060 (5)	0.093 (6)	0.066 (5)	−0.026 (4)	0.023 (4)	−0.001 (4)
C10b	0.097 (7)	0.078 (6)	0.067 (5)	−0.016 (5)	0.033 (5)	0.015 (4)
C11b	0.103 (7)	0.069 (5)	0.077 (6)	0.013 (5)	0.022 (5)	0.027 (4)
C12b	0.063 (4)	0.065 (5)	0.070 (5)	0.004 (4)	0.022 (4)	0.007 (4)
C13b	0.046 (3)	0.050 (4)	0.052 (4)	−0.004 (3)	0.012 (3)	0.008 (3)
C14b	0.061 (4)	0.045 (4)	0.080 (5)	−0.005 (3)	0.014 (4)	0.006 (3)
C15b	0.064 (5)	0.066 (5)	0.078 (6)	−0.004 (4)	0.003 (4)	0.031 (4)
C16b	0.087 (6)	0.100 (7)	0.057 (5)	−0.024 (5)	0.017 (4)	0.018 (5)
C17b	0.122 (8)	0.082 (6)	0.062 (5)	−0.008 (6)	0.027 (5)	−0.006 (5)
C18b	0.085 (6)	0.056 (4)	0.067 (5)	0.008 (4)	0.023 (4)	0.002 (4)

Geometric parameters (Å, º)

Sn1a—C1a	2.114 (6)	Sn1b—C1b	2.114 (6)
Sn1a—C13a	2.118 (6)	Sn1b—C7b	2.120 (7)
Sn1a—C7a	2.124 (6)	Sn1b—C13b	2.135 (6)
Sn1a—I1a	2.6862 (7)	Sn1b—I1b	2.6653 (8)
C1a—C2a	1.382 (9)	C1b—C6b	1.381 (9)
C1a—C6a	1.392 (9)	C1b—C2b	1.393 (9)
C2a—C3a	1.392 (10)	C2b—C3b	1.378 (10)
C2a—H2a	0.9300	C2b—H2b	0.9300
C3a—C4a	1.362 (11)	C3b—C4b	1.354 (11)
C3a—H3a	0.9300	C3b—H3b	0.9300
C4a—C5a	1.357 (11)	C4b—C5b	1.361 (11)
C4a—H4a	0.9300	C4b—H4b	0.9300
C5a—C6a	1.395 (10)	C5b—C6b	1.374 (10)
C5a—H5a	0.9300	C5b—H5b	0.9300
C6a—H6a	0.9300	C6b—H6b	0.9300
C7a—C8a	1.370 (9)	C7b—C12b	1.378 (10)
C7a—C12a	1.382 (9)	C7b—C8b	1.392 (9)
C8a—C9a	1.380 (11)	C8b—C9b	1.354 (10)
C8a—H8a	0.9300	C8b—H8b	0.9300
C9a—C10a	1.388 (13)	C9b—C10b	1.354 (12)
C9a—H9a	0.9300	C9b—H9b	0.9300
C10a—C11a	1.333 (13)	C10b—C11b	1.354 (12)
C10a—H10a	0.9300	C10b—H10b	0.9300
C11a—C12a	1.381 (11)	C11b—C12b	1.343 (11)
C11a—H11a	0.9300	C11b—H11b	0.9300
C12a—H12a	0.9300	C12b—H12b	0.9300
C13a—C14a	1.374 (9)	C13b—C18b	1.367 (10)
C13a—C18a	1.392 (9)	C13b—C14b	1.382 (9)
C14a—C15a	1.368 (10)	C14b—C15b	1.387 (11)
C14a—H14a	0.9300	C14b—H14b	0.9300
C15a—C16a	1.344 (11)	C15b—C16b	1.337 (12)
C15a—H15a	0.9300	C15b—H15b	0.9300
C16a—C17a	1.363 (11)	C16b—C17b	1.381 (13)
C16a—H16a	0.9300	C16b—H16b	0.9300
C17a—C18a	1.366 (9)	C17b—C18b	1.387 (11)
C17a—H17a	0.9300	C17b—H17b	0.9300
C18a—H18a	0.9300	C18b—H18b	0.9300
C1a—Sn1a—C13a	113.0 (2)	C1b—Sn1b—C7b	116.6 (2)
C1a—Sn1a—C7a	113.8 (2)	C1b—Sn1b—C13b	112.1 (2)
C13a—Sn1a—C7a	111.3 (2)	C7b—Sn1b—C13b	109.9 (2)
C1a—Sn1a—I1a	104.18 (17)	C1b—Sn1b—I1b	105.21 (17)
C13a—Sn1a—I1a	108.06 (17)	C7b—Sn1b—I1b	106.58 (18)
C7a—Sn1a—I1a	105.86 (17)	C13b—Sn1b—I1b	105.62 (18)
C2a—C1a—C6a	118.7 (6)	C6b—C1b—C2b	117.9 (6)
C2a—C1a—Sn1a	121.5 (5)	C6b—C1b—Sn1b	120.0 (5)
C6a—C1a—Sn1a	119.8 (5)	C2b—C1b—Sn1b	122.1 (5)
C1a—C2a—C3a	120.3 (7)	C3b—C2b—C1b	119.8 (7)
C1a—C2a—H2a	119.8	C3b—C2b—H2b	120.1
C3a—C2a—H2a	119.8	C1b—C2b—H2b	120.1
C4a—C3a—C2a	120.3 (7)	C4b—C3b—C2b	121.3 (7)
C4a—C3a—H3a	119.9	C4b—C3b—H3b	119.4
C2a—C3a—H3a	119.9	C2b—C3b—H3b	119.4
C5a—C4a—C3a	120.4 (7)	C3b—C4b—C5b	119.6 (7)
C5a—C4a—H4a	119.8	C3b—C4b—H4b	120.2
C3a—C4a—H4a	119.8	C5b—C4b—H4b	120.2
C4a—C5a—C6a	120.5 (7)	C4b—C5b—C6b	120.3 (7)
C4a—C5a—H5a	119.8	C4b—C5b—H5b	119.8
C6a—C5a—H5a	119.8	C6b—C5b—H5b	119.8
C1a—C6a—C5a	119.8 (7)	C5b—C6b—C1b	121.1 (7)
C1a—C6a—H6a	120.1	C5b—C6b—H6b	119.5
C5a—C6a—H6a	120.1	C1b—C6b—H6b	119.5
C8a—C7a—C12a	118.3 (7)	C12b—C7b—C8b	117.6 (7)
C8a—C7a—Sn1a	119.0 (5)	C12b—C7b—Sn1b	122.5 (5)
C12a—C7a—Sn1a	122.6 (5)	C8b—C7b—Sn1b	119.9 (5)
C7a—C8a—C9a	121.2 (7)	C9b—C8b—C7b	120.3 (7)
C7a—C8a—H8a	119.4	C9b—C8b—H8b	119.8
C9a—C8a—H8a	119.4	C7b—C8b—H8b	119.8
C8a—C9a—C10a	119.2 (8)	C8b—C9b—C10b	121.2 (7)
C8a—C9a—H9a	120.4	C8b—C9b—H9b	119.4
C10a—C9a—H9a	120.4	C10b—C9b—H9b	119.4
C11a—C10a—C9a	119.9 (8)	C9b—C10b—C11b	118.5 (8)
C11a—C10a—H10a	120.1	C9b—C10b—H10b	120.7
C9a—C10a—H10a	120.1	C11b—C10b—H10b	120.7
C10a—C11a—C12a	121.3 (8)	C12b—C11b—C10b	122.0 (8)
C10a—C11a—H11a	119.3	C12b—C11b—H11b	119.0
C12a—C11a—H11a	119.3	C10b—C11b—H11b	119.0
C11a—C12a—C7a	120.1 (8)	C11b—C12b—C7b	120.4 (8)
C11a—C12a—H12a	120.0	C11b—C12b—H12b	119.8
C7a—C12a—H12a	120.0	C7b—C12b—H12b	119.8
C14a—C13a—C18a	117.9 (6)	C18b—C13b—C14b	119.0 (7)
C14a—C13a—Sn1a	121.9 (5)	C18b—C13b—Sn1b	118.5 (5)
C18a—C13a—Sn1a	120.2 (5)	C14b—C13b—Sn1b	122.4 (5)
C15a—C14a—C13a	120.8 (7)	C13b—C14b—C15b	120.1 (7)
C15a—C14a—H14a	119.6	C13b—C14b—H14b	120.0
C13a—C14a—H14a	119.6	C15b—C14b—H14b	120.0
C16a—C15a—C14a	120.5 (7)	C16b—C15b—C14b	120.0 (8)
C16a—C15a—H15a	119.8	C16b—C15b—H15b	120.0
C14a—C15a—H15a	119.8	C14b—C15b—H15b	120.0
C15a—C16a—C17a	120.4 (7)	C15b—C16b—C17b	121.4 (8)
C15a—C16a—H16a	119.8	C15b—C16b—H16b	119.3
C17a—C16a—H16a	119.8	C17b—C16b—H16b	119.3
C16a—C17a—C18a	120.0 (7)	C16b—C17b—C18b	118.5 (8)
C16a—C17a—H17a	120.0	C16b—C17b—H17b	120.7
C18a—C17a—H17a	120.0	C18b—C17b—H17b	120.7
C17a—C18a—C13a	120.4 (7)	C13b—C18b—C17b	120.9 (7)
C17a—C18a—H18a	119.8	C13b—C18b—H18b	119.5
C13a—C18a—H18a	119.8	C17b—C18b—H18b	119.5
C13a—Sn1a—C1a—C2a	−114.9 (5)	C7b—Sn1b—C1b—C6b	−114.5 (5)
C7a—Sn1a—C1a—C2a	13.3 (6)	C13b—Sn1b—C1b—C6b	13.4 (6)
I1a—Sn1a—C1a—C2a	128.1 (5)	I1b—Sn1b—C1b—C6b	127.7 (5)
C13a—Sn1a—C1a—C6a	66.2 (6)	C7b—Sn1b—C1b—C2b	67.7 (6)
C7a—Sn1a—C1a—C6a	−165.6 (5)	C13b—Sn1b—C1b—C2b	−164.4 (5)
I1a—Sn1a—C1a—C6a	−50.8 (5)	I1b—Sn1b—C1b—C2b	−50.1 (6)
C6a—C1a—C2a—C3a	−1.1 (10)	C6b—C1b—C2b—C3b	−0.9 (11)
Sn1a—C1a—C2a—C3a	180.0 (6)	Sn1b—C1b—C2b—C3b	177.0 (6)
C1a—C2a—C3a—C4a	1.3 (12)	C1b—C2b—C3b—C4b	0.8 (13)
C2a—C3a—C4a—C5a	0.3 (13)	C2b—C3b—C4b—C5b	−0.2 (14)
C3a—C4a—C5a—C6a	−1.9 (13)	C3b—C4b—C5b—C6b	−0.3 (13)
C2a—C1a—C6a—C5a	−0.5 (10)	C4b—C5b—C6b—C1b	0.3 (12)
Sn1a—C1a—C6a—C5a	178.4 (6)	C2b—C1b—C6b—C5b	0.3 (10)
C4a—C5a—C6a—C1a	2.1 (12)	Sn1b—C1b—C6b—C5b	−177.6 (6)
C1a—Sn1a—C7a—C8a	−76.6 (6)	C1b—Sn1b—C7b—C12b	9.8 (7)
C13a—Sn1a—C7a—C8a	52.5 (6)	C13b—Sn1b—C7b—C12b	−119.2 (6)
I1a—Sn1a—C7a—C8a	169.6 (5)	I1b—Sn1b—C7b—C12b	126.8 (6)
C1a—Sn1a—C7a—C12a	101.7 (6)	C1b—Sn1b—C7b—C8b	−172.8 (5)
C13a—Sn1a—C7a—C12a	−129.3 (5)	C13b—Sn1b—C7b—C8b	58.3 (6)
I1a—Sn1a—C7a—C12a	−12.1 (6)	I1b—Sn1b—C7b—C8b	−55.7 (5)
C12a—C7a—C8a—C9a	0.0 (11)	C12b—C7b—C8b—C9b	1.8 (11)
Sn1a—C7a—C8a—C9a	178.2 (6)	Sn1b—C7b—C8b—C9b	−175.8 (6)
C7a—C8a—C9a—C10a	0.1 (13)	C7b—C8b—C9b—C10b	−1.2 (12)
C8a—C9a—C10a—C11a	0.1 (14)	C8b—C9b—C10b—C11b	−1.1 (13)
C9a—C10a—C11a—C12a	−0.3 (14)	C9b—C10b—C11b—C12b	2.6 (14)
C10a—C11a—C12a—C7a	0.4 (12)	C10b—C11b—C12b—C7b	−2.0 (13)
C8a—C7a—C12a—C11a	−0.2 (10)	C8b—C7b—C12b—C11b	−0.3 (11)
Sn1a—C7a—C12a—C11a	−178.4 (6)	Sn1b—C7b—C12b—C11b	177.2 (6)
C1a—Sn1a—C13a—C14a	4.0 (6)	C1b—Sn1b—C13b—C18b	−83.7 (6)
C7a—Sn1a—C13a—C14a	−125.5 (5)	C7b—Sn1b—C13b—C18b	47.7 (6)
I1a—Sn1a—C13a—C14a	118.7 (5)	I1b—Sn1b—C13b—C18b	162.3 (5)
C1a—Sn1a—C13a—C18a	−175.2 (5)	C1b—Sn1b—C13b—C14b	97.6 (6)
C7a—Sn1a—C13a—C18a	55.4 (6)	C7b—Sn1b—C13b—C14b	−131.0 (6)
I1a—Sn1a—C13a—C18a	−60.5 (5)	I1b—Sn1b—C13b—C14b	−16.4 (6)
C18a—C13a—C14a—C15a	−1.8 (10)	C18b—C13b—C14b—C15b	0.5 (11)
Sn1a—C13a—C14a—C15a	179.1 (6)	Sn1b—C13b—C14b—C15b	179.2 (5)
C13a—C14a—C15a—C16a	0.1 (12)	C13b—C14b—C15b—C16b	−0.6 (12)
C14a—C15a—C16a—C17a	1.0 (12)	C14b—C15b—C16b—C17b	−0.3 (13)
C15a—C16a—C17a—C18a	−0.4 (12)	C15b—C16b—C17b—C18b	1.4 (14)
C16a—C17a—C18a—C13a	−1.3 (11)	C14b—C13b—C18b—C17b	0.6 (12)
C14a—C13a—C18a—C17a	2.4 (10)	Sn1b—C13b—C18b—C17b	−178.2 (6)
Sn1a—C13a—C18a—C17a	−178.4 (5)	C16b—C17b—C18b—C13b	−1.5 (13)