catena-Poly[[[trimethyl­tin(IV)]-μ-4,4′-bipyridyl-κ²N:N′-[trimethyl­tin(IV)]-μ-1,3,4-thia­diazole-2,5(3H)-dithionato(2−)-κ²N³:S⁵] 4,4′-bipyridine clathrate]

In the title clathrate complex, {[Sn₂(CH₃)₆(C₂N₂S₃)(C₁₀H₈N₂)]·C₁₀H₈N₂}_n, two independent Sn atoms are five-coordinated in a distorted trigonal–bipyramidal geometry. The asymmetric unit contains two independent 4,4′-bipyridine systems, one of which bridges two independent Sn atoms [Sn—N = 2.588 (7) and 2.591 (7) Å], leading to the formation a one-dimensional polymeric zigzag chain.

Key indicators

• Single-crystal X-ray study
• T = 298 K
• Mean [sigma](C-C) = 0.014 Å
• R factor = 0.036
• wR factor = 0.092
• Data-to-parameter ratio = 11.4

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT062_ALERT_4_C Rescale T(min) & T(max) by .....................       0.95
PLAT125_ALERT_4_C No _symmetry_space_group_name_Hall Given .......          ?
PLAT241_ALERT_2_C Check High      Ueq as Compared to Neighbors for         S2
PLAT241_ALERT_2_C Check High      Ueq as Compared to Neighbors for        C10
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        Sn1
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        C11
PLAT342_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ...         14

Alert level G
ABSTM02_ALERT_3_G  When printed, the submitted absorption T values will be
            replaced by the scaled T values. Since the ratio of scaled T's
            is identical to the ratio of reported T values, the scaling
            does not imply a change to the absorption corrections used in
            the study.
            Ratio of Tmax expected/reported      0.949
            Tmax scaled      0.585 Tmin scaled      0.466
REFLT03_ALERT_4_G  WARNING: Large fraction of Friedel related reflns may
                     be needed to determine absolute structure
           From the CIF: _diffrn_reflns_theta_max           25.01
           From the CIF: _reflns_number_total               4003
           Count of symmetry unique reflns         2920
           Completeness (_total/calc)            137.09%
           TEST3: Check Friedels for noncentro structure
           Estimate of Friedel pairs measured      1083
           Fraction of Friedel pairs measured     0.371
           Are heavy atom types Z>Si present        yes

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

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

---

Computing details

Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL.

catena-Poly[[[trimethyltin(IV)]-µ-4,4'-bipyridyl-κ²N:N'-[trimethyltin(IV)]- µ-1,3,4-thiadiazole-2,5(3H)-dithionato(2-)-κ²N³:S⁵] 4,4'-bipyridine clathrate]

Crystal data

[Sn2(CH3)6(C2N2S3)(C10H8N2)]·C10H8N2	F(000) = 784
Mr = 788.17	Dx = 1.583 Mg m^−3
Monoclinic, Pc	Mo Kα radiation, λ = 0.71073 Å
a = 10.886 (5) Å	Cell parameters from 3491 reflections
b = 11.525 (5) Å	θ = 2.4–24.7°
c = 13.236 (6) Å	µ = 1.73 mm^−1
β = 95.249 (6)°	T = 298 K
V = 1653.6 (13) Å^3	Block, colourless
Z = 2	0.48 × 0.45 × 0.31 mm

Data collection

Bruker SMART CCD area-detector diffractometer	4003 independent reflections
Radiation source: fine-focus sealed tube	3440 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.061
φ and ω scans	θmax = 25.0°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −11→12
Tmin = 0.491, Tmax = 0.617	k = −13→13
8311 measured reflections	l = −15→13

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)] = 0.036	H-atom parameters constrained
wR(F^2) = 0.092	w = 1/[σ^2(Fo^2) + (0.0332P)^2] where P = (Fo^2 + 2Fc^2)/3
S = 1.00	(Δ/σ)max = 0.001
4003 reflections	Δρmax = 0.76 e Å^−3
352 parameters	Δρmin = −0.68 e Å^−3
2 restraints	Absolute structure: Flack (1983), 1083 Friedel pairs
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: 0.02 (3)

Special details

Experimental. Analysis, calculated for C₈₄H₆₀O₁₀F₁₆Sn₄: C 42.66, H 4.35, N 10.66; found: C 42.43, H 4.48, N 10.49. The elemental analyses were performed with PERKIN ELMER MODEL 2400 SERIES II.

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	0.38379 (5)	0.47796 (4)	0.97654 (4)	0.04496 (17)
Sn2	0.85269 (5)	0.39205 (5)	0.75091 (4)	0.04262 (16)
N1	0.6540 (6)	0.5467 (6)	0.8555 (6)	0.0476 (18)
N2	0.7723 (6)	0.5486 (5)	0.8250 (5)	0.0429 (16)
N3	0.2715 (7)	0.2916 (6)	1.0268 (5)	0.0492 (18)
N4	−0.0481 (7)	−0.2108 (6)	1.1759 (6)	0.0471 (17)
N5	0.8027 (11)	0.8740 (8)	0.4590 (8)	0.085 (3)
N6	0.3368 (9)	1.0333 (10)	0.7765 (8)	0.078 (3)
S1	0.7431 (2)	0.74312 (17)	0.90677 (18)	0.0513 (5)
S2	0.4846 (2)	0.6756 (2)	0.9437 (2)	0.0636 (7)
S3	0.9816 (2)	0.6751 (2)	0.8250 (2)	0.0616 (6)
C1	0.6240 (8)	0.6425 (7)	0.8968 (7)	0.048 (2)
C2	0.8359 (7)	0.6446 (6)	0.8477 (6)	0.0370 (17)
C3	0.3495 (11)	0.4253 (9)	0.8240 (8)	0.074 (3)
H3A	0.2784	0.4654	0.7932	0.111*
H3B	0.3348	0.3432	0.8213	0.111*
H3C	0.4198	0.4434	0.7880	0.111*
C4	0.5349 (9)	0.4057 (9)	1.0675 (9)	0.072 (3)
H4A	0.5383	0.4384	1.1344	0.108*
H4B	0.6100	0.4228	1.0379	0.108*
H4C	0.5247	0.3231	1.0715	0.108*
C5	0.2349 (8)	0.5716 (8)	1.0367 (9)	0.062 (3)
H5A	0.2584	0.5923	1.1060	0.093*
H5B	0.1627	0.5235	1.0333	0.093*
H5C	0.2175	0.6407	0.9974	0.093*
C6	0.9881 (9)	0.3637 (8)	0.8738 (8)	0.066 (3)
H6A	0.9522	0.3215	0.9263	0.098*
H6B	1.0184	0.4370	0.9000	0.098*
H6C	1.0551	0.3197	0.8508	0.098*
C7	0.6828 (8)	0.3003 (8)	0.7393 (9)	0.064 (3)
H7A	0.6727	0.2620	0.8024	0.095*
H7B	0.6828	0.2436	0.6861	0.095*
H7C	0.6160	0.3537	0.7240	0.095*
C8	0.8904 (10)	0.4822 (7)	0.6171 (7)	0.055 (2)
H8A	0.8168	0.4858	0.5713	0.083*
H8B	0.9536	0.4420	0.5850	0.083*
H8C	0.9177	0.5595	0.6344	0.083*
C9	0.2068 (10)	0.2896 (8)	1.1084 (8)	0.067 (3)
H9	0.2043	0.3569	1.1469	0.081*
C10	0.1430 (11)	0.1927 (9)	1.1390 (8)	0.069 (3)
H10	0.1015	0.1959	1.1974	0.083*
C11	0.1415 (8)	0.0932 (7)	1.0832 (6)	0.038 (2)
C12	0.2062 (11)	0.0962 (8)	0.9981 (8)	0.058 (3)
H12	0.2090	0.0306	0.9575	0.070*
C13	0.2656 (9)	0.1942 (8)	0.9734 (8)	0.062 (3)
H13	0.3055	0.1930	0.9142	0.075*
C14	−0.0409 (10)	−0.1127 (8)	1.2325 (8)	0.062 (3)
H14	−0.0768	−0.1122	1.2936	0.074*
C15	0.0168 (10)	−0.0144 (8)	1.2035 (8)	0.056 (3)
H15	0.0187	0.0509	1.2449	0.067*
C16	0.0729 (8)	−0.0105 (6)	1.1132 (7)	0.039 (2)
C17	0.0601 (9)	−0.1107 (7)	1.0548 (7)	0.053 (2)
H17	0.0911	−0.1125	0.9916	0.063*
C18	0.0031 (9)	−0.2057 (8)	1.0885 (7)	0.056 (2)
H18	−0.0004	−0.2717	1.0480	0.068*
C19	0.8020 (10)	0.8317 (10)	0.5515 (10)	0.075 (3)
H19	0.8637	0.7794	0.5736	0.090*
C20	0.7148 (9)	0.8603 (9)	0.6185 (8)	0.060 (2)
H20	0.7203	0.8293	0.6836	0.071*
C21	0.6177 (9)	0.9373 (7)	0.5855 (7)	0.052 (2)
C22	0.6178 (12)	0.9781 (9)	0.4891 (10)	0.080 (3)
H22	0.5553	1.0273	0.4626	0.095*
C23	0.7119 (15)	0.9460 (10)	0.4299 (10)	0.094 (4)
H23	0.7106	0.9776	0.3652	0.113*
C24	0.3754 (12)	1.1020 (10)	0.7061 (11)	0.082 (4)
H24	0.3384	1.1746	0.6986	0.098*
C25	0.4643 (9)	1.0767 (8)	0.6434 (8)	0.061 (3)
H25	0.4865	1.1308	0.5962	0.073*
C26	0.5211 (9)	0.9689 (7)	0.6512 (7)	0.050 (2)
C27	0.4814 (10)	0.8945 (9)	0.7231 (8)	0.062 (3)
H27	0.5159	0.8209	0.7308	0.075*
C28	0.3908 (11)	0.9283 (11)	0.7840 (10)	0.081 (3)
H28	0.3663	0.8763	0.8320	0.097*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Sn1	0.0436 (3)	0.0497 (3)	0.0423 (3)	0.0034 (3)	0.0082 (2)	−0.0007 (3)
Sn2	0.0403 (3)	0.0481 (3)	0.0403 (3)	−0.0016 (3)	0.0079 (2)	−0.0025 (3)
N1	0.041 (4)	0.049 (4)	0.054 (5)	−0.003 (3)	0.014 (4)	−0.001 (4)
N2	0.050 (4)	0.040 (4)	0.040 (4)	−0.006 (3)	0.014 (3)	−0.005 (3)
N3	0.061 (5)	0.050 (4)	0.038 (4)	−0.008 (3)	0.015 (3)	−0.006 (3)
N4	0.050 (4)	0.039 (4)	0.056 (5)	0.002 (3)	0.023 (4)	−0.003 (3)
N5	0.112 (9)	0.073 (6)	0.077 (7)	−0.002 (6)	0.040 (7)	0.002 (5)
N6	0.067 (6)	0.106 (8)	0.063 (6)	0.008 (6)	0.017 (5)	−0.023 (6)
S1	0.0592 (14)	0.0408 (11)	0.0557 (14)	−0.0051 (10)	0.0148 (11)	−0.0043 (10)
S2	0.0562 (14)	0.0460 (13)	0.093 (2)	0.0048 (11)	0.0325 (14)	−0.0016 (13)
S3	0.0561 (14)	0.0712 (15)	0.0604 (16)	−0.0202 (12)	0.0210 (12)	−0.0075 (13)
C1	0.053 (5)	0.045 (5)	0.046 (5)	0.002 (4)	0.013 (4)	0.001 (4)
C2	0.046 (4)	0.037 (4)	0.028 (4)	−0.003 (3)	0.006 (3)	−0.006 (3)
C3	0.089 (8)	0.088 (7)	0.049 (6)	−0.028 (6)	0.022 (6)	−0.007 (5)
C4	0.048 (6)	0.075 (6)	0.090 (8)	−0.003 (5)	−0.008 (5)	0.032 (6)
C5	0.030 (5)	0.072 (6)	0.087 (8)	0.015 (4)	0.019 (5)	−0.003 (6)
C6	0.065 (6)	0.064 (5)	0.064 (7)	−0.004 (5)	−0.018 (5)	0.002 (5)
C7	0.050 (5)	0.049 (5)	0.093 (8)	−0.007 (4)	0.011 (5)	−0.008 (5)
C8	0.075 (7)	0.054 (5)	0.038 (5)	0.004 (5)	0.015 (5)	−0.001 (4)
C9	0.093 (8)	0.053 (6)	0.060 (6)	−0.015 (5)	0.028 (6)	−0.012 (5)
C10	0.097 (8)	0.060 (6)	0.058 (6)	−0.024 (5)	0.049 (6)	−0.018 (5)
C11	0.045 (5)	0.037 (4)	0.032 (5)	0.003 (4)	0.011 (4)	0.001 (4)
C12	0.079 (7)	0.049 (5)	0.052 (6)	−0.005 (5)	0.036 (5)	−0.004 (4)
C13	0.075 (7)	0.058 (6)	0.061 (6)	0.009 (5)	0.039 (5)	0.005 (5)
C14	0.082 (7)	0.056 (5)	0.052 (6)	−0.011 (5)	0.031 (5)	−0.005 (5)
C15	0.074 (7)	0.047 (5)	0.050 (6)	−0.004 (4)	0.026 (5)	−0.001 (4)
C16	0.043 (5)	0.038 (4)	0.039 (5)	0.003 (3)	0.017 (4)	0.002 (4)
C17	0.066 (6)	0.053 (5)	0.042 (5)	−0.016 (4)	0.020 (4)	−0.008 (4)
C18	0.065 (6)	0.056 (5)	0.050 (6)	−0.004 (5)	0.012 (5)	−0.015 (5)
C19	0.061 (6)	0.074 (7)	0.091 (10)	0.004 (5)	0.018 (6)	0.002 (7)
C20	0.057 (6)	0.070 (6)	0.052 (6)	0.008 (5)	0.007 (5)	0.001 (5)
C21	0.067 (6)	0.040 (4)	0.048 (6)	−0.007 (4)	0.006 (4)	−0.005 (4)
C22	0.098 (9)	0.070 (7)	0.070 (8)	0.011 (6)	0.009 (7)	0.013 (6)
C23	0.146 (13)	0.072 (8)	0.070 (9)	0.009 (8)	0.047 (9)	0.019 (7)
C24	0.087 (9)	0.068 (7)	0.090 (10)	0.011 (6)	0.006 (8)	−0.016 (7)
C25	0.075 (7)	0.047 (5)	0.060 (6)	−0.006 (5)	0.002 (5)	−0.010 (5)
C26	0.058 (6)	0.048 (5)	0.043 (5)	−0.003 (4)	0.003 (4)	−0.010 (4)
C27	0.067 (7)	0.070 (6)	0.049 (6)	0.007 (5)	0.001 (5)	−0.003 (5)
C28	0.078 (8)	0.100 (9)	0.065 (8)	0.007 (7)	0.007 (6)	−0.001 (7)

Geometric parameters (Å, º)

Sn1—C3	2.109 (10)	C7—H7B	0.9600
Sn1—C4	2.118 (9)	C7—H7C	0.9600
Sn1—C5	2.158 (9)	C8—H8A	0.9600
Sn1—S2	2.582 (3)	C8—H8B	0.9600
Sn1—N3	2.588 (7)	C8—H8C	0.9600
Sn2—C6	2.119 (9)	C9—C10	1.394 (14)
Sn2—C7	2.124 (9)	C9—H9	0.9300
Sn2—C8	2.126 (9)	C10—C11	1.364 (12)
Sn2—N2	2.267 (6)	C10—H10	0.9300
Sn2—N4^i	2.591 (7)	C11—C12	1.382 (13)
N1—C1	1.287 (11)	C11—C16	1.482 (11)
N1—N2	1.384 (9)	C12—C13	1.356 (13)
N2—C2	1.325 (10)	C12—H12	0.9300
N3—C13	1.325 (11)	C13—H13	0.9300
N3—C9	1.342 (12)	C14—C15	1.367 (13)
N4—C18	1.330 (12)	C14—H14	0.9300
N4—C14	1.355 (11)	C15—C16	1.392 (14)
N4—Sn2^ii	2.591 (7)	C15—H15	0.9300
N5—C19	1.318 (16)	C16—C17	1.390 (11)
N5—C23	1.320 (16)	C17—C18	1.354 (13)
N6—C24	1.320 (16)	C17—H17	0.9300
N6—C28	1.345 (15)	C18—H18	0.9300
S1—C1	1.736 (9)	C19—C20	1.397 (15)
S1—C2	1.751 (8)	C19—H19	0.9300
S2—C1	1.734 (9)	C20—C21	1.418 (13)
S3—C2	1.679 (8)	C20—H20	0.9300
C3—H3A	0.9600	C21—C22	1.360 (15)
C3—H3B	0.9600	C21—C26	1.470 (14)
C3—H3C	0.9600	C22—C23	1.395 (18)
C4—H4A	0.9600	C22—H22	0.9300
C4—H4B	0.9600	C23—H23	0.9300
C4—H4C	0.9600	C24—C25	1.363 (18)
C5—H5A	0.9600	C24—H24	0.9300
C5—H5B	0.9600	C25—C26	1.387 (13)
C5—H5C	0.9600	C25—H25	0.9300
C6—H6A	0.9600	C26—C27	1.380 (14)
C6—H6B	0.9600	C27—C28	1.385 (16)
C6—H6C	0.9600	C27—H27	0.9300
C7—H7A	0.9600	C28—H28	0.9300
C3—Sn1—C4	119.4 (5)	H7A—C7—H7C	109.5
C3—Sn1—C5	115.1 (4)	H7B—C7—H7C	109.5
C4—Sn1—C5	123.9 (5)	Sn2—C8—H8A	109.5
C3—Sn1—S2	97.7 (3)	Sn2—C8—H8B	109.5
C4—Sn1—S2	97.0 (3)	H8A—C8—H8B	109.5
C5—Sn1—S2	88.0 (3)	Sn2—C8—H8C	109.5
C3—Sn1—N3	87.8 (3)	H8A—C8—H8C	109.5
C4—Sn1—N3	83.6 (3)	H8B—C8—H8C	109.5
C5—Sn1—N3	86.1 (3)	N3—C9—C10	124.0 (9)
S2—Sn1—N3	173.30 (17)	N3—C9—H9	118.0
C6—Sn2—C7	121.3 (4)	C10—C9—H9	118.0
C6—Sn2—C8	122.8 (4)	C11—C10—C9	119.8 (9)
C7—Sn2—C8	114.6 (4)	C11—C10—H10	120.1
C6—Sn2—N2	93.4 (3)	C9—C10—H10	120.1
C7—Sn2—N2	93.4 (3)	C10—C11—C12	116.0 (9)
C8—Sn2—N2	94.8 (3)	C10—C11—C16	120.9 (8)
C6—Sn2—N4^i	83.4 (3)	C12—C11—C16	123.1 (8)
C7—Sn2—N4^i	87.8 (3)	C13—C12—C11	120.5 (9)
C8—Sn2—N4^i	87.5 (3)	C13—C12—H12	119.7
N2—Sn2—N4^i	176.8 (3)	C11—C12—H12	119.7
C1—N1—N2	112.9 (7)	N3—C13—C12	125.2 (9)
C2—N2—N1	115.3 (6)	N3—C13—H13	117.4
C2—N2—Sn2	123.3 (5)	C12—C13—H13	117.4
N1—N2—Sn2	121.3 (5)	N4—C14—C15	122.8 (9)
C13—N3—C9	114.3 (8)	N4—C14—H14	118.6
C13—N3—Sn1	124.5 (6)	C15—C14—H14	118.6
C9—N3—Sn1	121.1 (6)	C14—C15—C16	121.1 (9)
C18—N4—C14	115.9 (8)	C14—C15—H15	119.5
C18—N4—Sn2^ii	126.3 (6)	C16—C15—H15	119.5
C14—N4—Sn2^ii	117.8 (6)	C17—C16—C15	114.9 (8)
C19—N5—C23	115.8 (11)	C17—C16—C11	123.2 (8)
C24—N6—C28	115.3 (11)	C15—C16—C11	121.8 (7)
C1—S1—C2	89.4 (4)	C18—C17—C16	120.9 (9)
C1—S2—Sn1	105.4 (3)	C18—C17—H17	119.5
N1—C1—S2	127.3 (7)	C16—C17—H17	119.5
N1—C1—S1	112.9 (6)	N4—C18—C17	124.3 (9)
S2—C1—S1	119.8 (5)	N4—C18—H18	117.8
N2—C2—S3	128.1 (6)	C17—C18—H18	117.8
N2—C2—S1	109.4 (6)	N5—C19—C20	124.4 (11)
S3—C2—S1	122.5 (4)	N5—C19—H19	117.8
Sn1—C3—H3A	109.5	C20—C19—H19	117.8
Sn1—C3—H3B	109.5	C19—C20—C21	118.9 (10)
H3A—C3—H3B	109.5	C19—C20—H20	120.6
Sn1—C3—H3C	109.5	C21—C20—H20	120.6
H3A—C3—H3C	109.5	C22—C21—C20	116.1 (10)
H3B—C3—H3C	109.5	C22—C21—C26	122.1 (9)
Sn1—C4—H4A	109.5	C20—C21—C26	121.8 (8)
Sn1—C4—H4B	109.5	C21—C22—C23	119.9 (11)
H4A—C4—H4B	109.5	C21—C22—H22	120.0
Sn1—C4—H4C	109.5	C23—C22—H22	120.0
H4A—C4—H4C	109.5	N5—C23—C22	124.8 (11)
H4B—C4—H4C	109.5	N5—C23—H23	117.6
Sn1—C5—H5A	109.5	C22—C23—H23	117.6
Sn1—C5—H5B	109.5	N6—C24—C25	126.2 (11)
H5A—C5—H5B	109.5	N6—C24—H24	116.9
Sn1—C5—H5C	109.5	C25—C24—H24	116.9
H5A—C5—H5C	109.5	C24—C25—C26	118.9 (11)
H5B—C5—H5C	109.5	C24—C25—H25	120.6
Sn2—C6—H6A	109.5	C26—C25—H25	120.6
Sn2—C6—H6B	109.5	C27—C26—C25	116.2 (10)
H6A—C6—H6B	109.5	C27—C26—C21	122.7 (8)
Sn2—C6—H6C	109.5	C25—C26—C21	121.1 (9)
H6A—C6—H6C	109.5	C26—C27—C28	120.8 (10)
H6B—C6—H6C	109.5	C26—C27—H27	119.6
Sn2—C7—H7A	109.5	C28—C27—H27	119.6
Sn2—C7—H7B	109.5	N6—C28—C27	122.6 (12)
H7A—C7—H7B	109.5	N6—C28—H28	118.7
Sn2—C7—H7C	109.5	C27—C28—H28	118.7

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