# Supplementary Material (ESI) for ChemComm
# This journal is © The Royal Society of Chemistry 2001
# CCDC Number: 182/1887
 
data_dw9924 
 
_audit_creation_method            SHELXL 
_chemical_name_systematic 
; 
 ? 
; 
_chemical_name_common             ? 
_chemical_formula_moiety          ? 
_chemical_formula_structural      ? 
_chemical_formula_analytical      ? 
_chemical_formula_sum             'C27 H63 N6 O P Si Sn8' 
_chemical_formula_weight          1496.41 
_chemical_melting_point           ? 
_chemical_compound_source         ? 
 
loop_ 
 _atom_type_symbol 
 _atom_type_description 
 _atom_type_scat_dispersion_real 
 _atom_type_scat_dispersion_imag 
 _atom_type_scat_source 
 'C'  'C'   0.0033   0.0016 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'H'  'H'   0.0000   0.0000 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'N'  'N'   0.0061   0.0033 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'Si'  'Si'   0.0817   0.0704 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'P'  'P'   0.1023   0.0942 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'Sn'  'Sn'  -0.6537   1.4246 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'O'  'O'   0.0106   0.0060 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 
_symmetry_cell_setting            Monoclinic 
_symmetry_space_group_name_H-M    Cm 
 
loop_ 
 _symmetry_equiv_pos_as_xyz 
 'x, y, z' 
 'x, -y, z' 
 'x+1/2, y+1/2, z' 
 'x+1/2, -y+1/2, z' 
 
_cell_length_a                    13.453(3) 
_cell_length_b                    15.280(3) 
_cell_length_c                    12.736(3) 
_cell_angle_alpha                 90.00 
_cell_angle_beta                  116.00(3) 
_cell_angle_gamma                 90.00 
_cell_volume                      2353.1(8) 
_cell_formula_units_Z             2 
_cell_measurement_temperature     220(2) 
_cell_measurement_reflns_used     15443 
_cell_measurement_theta_min       0.998 
_cell_measurement_theta_max       27.485 
 
_exptl_crystal_description        Block 
_exptl_crystal_colour             Yellow 
_exptl_crystal_size_max           0.09 
_exptl_crystal_size_mid           0.09 
_exptl_crystal_size_min           0.02 
_exptl_crystal_density_meas       ? 
_exptl_crystal_density_diffrn     2.112 
_exptl_crystal_density_method     ? 
_exptl_crystal_F_000              1408 
_exptl_absorpt_coefficient_mu     4.258 
_exptl_absorpt_correction_type    SORTAV 
_exptl_absorpt_correction_T_min   0.92 
_exptl_absorpt_correction_T_max   0.87 
 
_exptl_special_details 
; 
 ? 
; 
 
_diffrn_ambient_temperature       220(2) 
_diffrn_radiation_wavelength      0.71073 
_diffrn_radiation_type            MoK\a 
_diffrn_radiation_source          'fine-focus sealed tube' 
_diffrn_radiation_monochromator   graphite 
_diffrn_measurement_device        ? 
_diffrn_measurement_method        ? 
_diffrn_standards_number          ? 
_diffrn_standards_interval_count  ? 
_diffrn_standards_interval_time   ? 
_diffrn_standards_decay_%         ? 
_diffrn_reflns_number             10543 
_diffrn_reflns_av_R_equivalents   0.0210 
_diffrn_reflns_av_sigmaI/netI     0.0522 
_diffrn_reflns_limit_h_min        -17 
_diffrn_reflns_limit_h_max        17 
_diffrn_reflns_limit_k_min        -19 
_diffrn_reflns_limit_k_max        19 
_diffrn_reflns_limit_l_min        -16 
_diffrn_reflns_limit_l_max        16 
_diffrn_reflns_theta_min          1.78 
_diffrn_reflns_theta_max          27.53 
_reflns_number_total              5252 
_reflns_number_observed           4605 
_reflns_observed_criterion        >2sigma(I) 
 
_computing_data_collection        ? 
_computing_cell_refinement        ? 
_computing_data_reduction         ? 
_computing_structure_solution     TeXsan 
_computing_structure_refinement   'SHELXL-97 (Sheldrick, 1997)' 
_computing_molecular_graphics     'SHELXTL-PLUS (sheldrick, 1991)' 
_computing_publication_material   'SHELXL-97 (Sheldrick, 1997)' 
 
_refine_special_details 
; 
 Refinement on F^2^ for ALL reflections except for 14 with very negative F^2^ 
 or flagged by the user for potential systematic errors.  Weighted R-factors 
 wR and all goodnesses of fit S are based on F^2^, conventional R-factors R 
 are based on F, with F set to zero for negative F^2^. The observed criterion 
 of F^2^ > 2sigma(F^2^) is used only for calculating _R_factor_obs etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F^2^ are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
; 
 
_refine_ls_structure_factor_coef  Fsqd  
_refine_ls_matrix_type            full 
_refine_ls_weighting_scheme 
 'calc w=1/[\s^2^(Fo^2^)+(0.0245P)^2^+20.0967P] where P=(Fo^2^+2Fc^2^)/3' 
_atom_sites_solution_primary      direct 
_atom_sites_solution_secondary    difmap 
_atom_sites_solution_hydrogens    geom 
_refine_ls_hydrogen_treatment     'Riding model' 
_refine_ls_extinction_method      none 
_refine_ls_extinction_coef        ? 
_refine_ls_abs_structure_details 
 'Flack H D (1983), Acta Cryst. A39, 876-881' 
_refine_ls_abs_structure_Flack    0.53(6) 
_refine_ls_number_reflns          5238 
_refine_ls_number_parameters      220 
_refine_ls_number_restraints      2 
_refine_ls_R_factor_all           0.0593 
_refine_ls_R_factor_obs           0.0425 
_refine_ls_wR_factor_all          0.1928 
_refine_ls_wR_factor_obs          0.0875 
_refine_ls_goodness_of_fit_all    1.056 
_refine_ls_goodness_of_fit_obs    1.082 
_refine_ls_restrained_S_all       2.227 
_refine_ls_restrained_S_obs       1.082 
_refine_ls_shift/esd_max          0.002 
_refine_ls_shift/esd_mean         0.000 
 
loop_ 
 _atom_site_label 
 _atom_site_type_symbol 
 _atom_site_fract_x 
 _atom_site_fract_y 
 _atom_site_fract_z 
 _atom_site_U_iso_or_equiv 
 _atom_site_thermal_displace_type 
 _atom_site_occupancy 
 _atom_site_calc_flag 
 _atom_site_refinement_flags 
 _atom_site_disorder_group 
Sn1 Sn 0.15462(7) 0.5000 0.32939(8) 0.0380(2) Uani 1 d S . 
Sn2 Sn 0.37491(7) 0.5000 0.58736(7) 0.0325(2) Uani 1 d S . 
Sn3 Sn 0.40484(5) 0.38835(5) 0.37749(6) 0.0424(2) Uani 1 d . . 
Sn4 Sn 0.21356(5) 0.38627(5) 0.03859(6) 0.0387(2) Uani 1 d . . 
Sn5 Sn 0.27741(7) 0.5000 -0.14413(7) 0.0314(2) Uani 1 d S . 
Sn6 Sn 0.47265(7) 0.5000 0.13417(7) 0.0357(2) Uani 1 d S . 
P1 P 0.2676(3) 0.5000 0.2100(3) 0.0452(9) Uani 1 d S . 
N1 N 0.4798(7) 0.5000 0.4955(9) 0.027(2) Uani 1 d S . 
C1 C 0.6071(11) 0.5000 0.5688(15) 0.051(4) Uani 1 d S . 
C11 C 0.6646(10) 0.5000 0.4863(15) 0.059(5) Uani 1 d S . 
H11A H 0.6459(10) 0.4467 0.4403(15) 0.088 Uiso 0.50 calc PR . 
H11B H 0.7442(10) 0.5031 0.5325(15) 0.088 Uiso 1 calc SR . 
H11C H 0.6398(10) 0.5502 0.4346(15) 0.088 Uiso 0.50 calc PR . 
C12 C 0.6323(10) 0.5831(9) 0.6460(12) 0.075(4) Uani 1 d . . 
H12A H 0.6163(10) 0.6348(9) 0.5970(12) 0.113 Uiso 1 calc R . 
H12B H 0.7098(10) 0.5833(9) 0.7017(12) 0.113 Uiso 1 calc R . 
H12C H 0.5868(10) 0.5833(9) 0.6876(12) 0.113 Uiso 1 calc R . 
N2 N 0.2794(6) 0.4059(5) 0.4466(6) 0.030(2) Uani 1 d . . 
C2 C 0.2369(8) 0.3254(7) 0.4766(8) 0.037(2) Uani 1 d . . 
C21 C 0.1635(9) 0.3478(8) 0.5375(10) 0.051(3) Uani 1 d . . 
H21A H 0.1022(9) 0.3841(8) 0.4863(10) 0.077 Uiso 1 calc R . 
H21B H 0.2068(9) 0.3791(8) 0.6094(10) 0.077 Uiso 1 calc R . 
H21C H 0.1350(9) 0.2942(8) 0.5550(10) 0.077 Uiso 1 calc R . 
C22 C 0.1646(12) 0.2746(8) 0.3578(10) 0.059(3) Uani 1 d . . 
H22A H 0.1033(12) 0.3113(8) 0.3076(10) 0.088 Uiso 1 calc R . 
H22B H 0.1363(12) 0.2209(8) 0.3751(10) 0.088 Uiso 1 calc R . 
H22C H 0.2103(12) 0.2609(8) 0.3186(10) 0.088 Uiso 1 calc R . 
C23 C 0.3325(10) 0.2688(7) 0.5553(10) 0.057(3) Uani 1 d . . 
H23A H 0.3784(10) 0.2550(7) 0.5163(10) 0.086 Uiso 1 calc R . 
H23B H 0.3044(10) 0.2151(7) 0.5729(10) 0.086 Uiso 1 calc R . 
H23C H 0.3762(10) 0.3000(7) 0.6273(10) 0.086 Uiso 1 calc R . 
N3 N 0.1499(9) 0.5000 -0.0781(10) 0.035(3) Uani 1 d S . 
C3 C 0.0321(10) 0.5000 -0.1654(12) 0.036(3) Uani 1 d S . 
C31 C -0.0424(13) 0.5000 -0.0993(16) 0.068(5) Uani 1 d S . 
H31A H -0.0246(13) 0.5505 -0.0480(16) 0.102 Uiso 0.50 calc PR . 
H31B H -0.0292(13) 0.4469 -0.0533(16) 0.102 Uiso 0.50 calc PR . 
H31C H -0.1196(13) 0.5026 -0.1555(16) 0.102 Uiso 1 calc SR . 
C32 C 0.0012(9) 0.4213(8) -0.2424(11) 0.066(4) Uani 1 d . . 
H32A H 0.0203(9) 0.3688(8) -0.1947(11) 0.099 Uiso 1 calc R . 
H32B H 0.0408(9) 0.4219(8) -0.2902(11) 0.099 Uiso 1 calc R . 
H32C H -0.0778(9) 0.4219(8) -0.2924(11) 0.099 Uiso 1 calc R . 
N4 N 0.3539(5) 0.4064(5) -0.0007(6) 0.026(2) Uani 1 d . . 
C4 C 0.3996(8) 0.3217(7) -0.0263(8) 0.037(2) Uani 1 d . . 
C41 C 0.3051(10) 0.2616(9) -0.1131(10) 0.055(3) Uani 1 d . . 
H41A H 0.2640(10) 0.2927(9) -0.1859(10) 0.083 Uiso 1 calc R . 
H41B H 0.2556(10) 0.2459(9) -0.0791(10) 0.083 Uiso 1 calc R . 
H41C H 0.3370(10) 0.2089(9) -0.1282(10) 0.083 Uiso 1 calc R . 
C42 C 0.4652(10) 0.2750(7) 0.0883(11) 0.051(3) Uani 1 d . . 
H42A H 0.4171(10) 0.2613(7) 0.1248(11) 0.077 Uiso 1 calc R . 
H42B H 0.5250(10) 0.3124(7) 0.1397(11) 0.077 Uiso 1 calc R . 
H42C H 0.4957(10) 0.2213(7) 0.0739(11) 0.077 Uiso 1 calc R . 
C43 C 0.4759(10) 0.3439(8) -0.0854(9) 0.054(3) Uani 1 d . . 
H43A H 0.4334(10) 0.3738(8) -0.1588(9) 0.081 Uiso 1 calc R . 
H43B H 0.5064(10) 0.2903(8) -0.1001(9) 0.081 Uiso 1 calc R . 
H43C H 0.5357(10) 0.3815(8) -0.0343(9) 0.081 Uiso 1 calc R . 
Si1 Si 0.7300(4) 0.5000 0.1435(4) 0.0544(11) Uani 1 d S . 
O1 O 0.5945(8) 0.5000 0.0868(10) 0.057(3) Uani 1 d S . 
C51 C 0.7718(22) 0.5000 0.0315(28) 0.149(12) Uani 1 d S . 
H51A H 0.7418(22) 0.4489 -0.0175(28) 0.223 Uiso 0.50 calc PR . 
H51B H 0.8519(22) 0.4985 0.0651(28) 0.223 Uiso 1 calc SR . 
H51C H 0.7449(22) 0.5526 -0.0152(28) 0.223 Uiso 0.50 calc PR . 
C52 C 0.7891(19) 0.5990(12) 0.2361(24) 0.172(13) Uani 1 d . . 
H52A H 0.7667(19) 0.6000(12) 0.2989(24) 0.258 Uiso 1 calc R . 
H52B H 0.7622(19) 0.6512(12) 0.1887(24) 0.258 Uiso 1 calc R . 
H52C H 0.8692(19) 0.5971(12) 0.2689(24) 0.258 Uiso 1 calc R . 
 
loop_ 
 _atom_site_aniso_label 
 _atom_site_aniso_U_11 
 _atom_site_aniso_U_22 
 _atom_site_aniso_U_33 
 _atom_site_aniso_U_23 
 _atom_site_aniso_U_13 
 _atom_site_aniso_U_12 
Sn1 0.0271(4) 0.0469(6) 0.0331(5) 0.000 0.0069(4) 0.000 
Sn2 0.0387(5) 0.0288(5) 0.0222(4) 0.000 0.0062(4) 0.000 
Sn3 0.0402(4) 0.0331(4) 0.0612(5) -0.0103(3) 0.0290(3) -0.0008(3) 
Sn4 0.0391(4) 0.0309(4) 0.0531(4) 0.0064(3) 0.0269(3) -0.0015(3) 
Sn5 0.0348(5) 0.0311(5) 0.0238(4) 0.000 0.0088(4) 0.000 
Sn6 0.0278(5) 0.0398(5) 0.0316(5) 0.000 0.0057(4) 0.000 
P1 0.045(2) 0.062(2) 0.033(2) 0.000 0.020(2) 0.000 
N1 0.016(5) 0.018(5) 0.037(5) 0.000 0.004(4) 0.000 
C1 0.030(7) 0.045(9) 0.078(11) 0.000 0.022(7) 0.000 
C11 0.011(6) 0.065(11) 0.075(11) 0.000 -0.005(7) 0.000 
C12 0.045(7) 0.067(8) 0.083(9) -0.001(7) -0.001(6) -0.032(6) 
N2 0.034(4) 0.038(5) 0.022(4) 0.002(3) 0.016(3) 0.006(3) 
C2 0.044(5) 0.035(6) 0.031(5) -0.006(4) 0.016(4) -0.019(4) 
C21 0.055(7) 0.051(7) 0.054(6) 0.002(5) 0.030(5) -0.024(5) 
C22 0.085(9) 0.053(8) 0.036(6) -0.019(5) 0.025(6) -0.032(7) 
C23 0.083(9) 0.020(5) 0.064(8) 0.011(5) 0.028(7) -0.007(5) 
N3 0.037(6) 0.027(6) 0.046(6) 0.000 0.022(5) 0.000 
C3 0.018(6) 0.038(8) 0.049(8) 0.000 0.011(5) 0.000 
C31 0.034(8) 0.070(12) 0.089(13) 0.000 0.018(9) 0.000 
C32 0.038(6) 0.047(7) 0.072(8) -0.006(6) -0.013(5) 0.008(5) 
N4 0.027(4) 0.022(4) 0.031(3) 0.004(3) 0.014(3) 0.011(3) 
C4 0.049(6) 0.028(5) 0.037(5) 0.002(4) 0.021(4) 0.010(4) 
C41 0.057(7) 0.059(8) 0.055(7) -0.025(6) 0.029(6) 0.000(6) 
C42 0.052(6) 0.034(6) 0.068(7) 0.006(5) 0.026(6) 0.023(5) 
C43 0.066(7) 0.059(8) 0.051(6) -0.008(5) 0.039(6) 0.008(6) 
Si1 0.042(2) 0.054(2) 0.076(3) 0.000 0.034(2) 0.000 
O1 0.049(6) 0.060(6) 0.078(7) 0.000 0.044(6) 0.000 
C51 0.089(18) 0.200(32) 0.200(32) 0.000 0.102(21) 0.000 
C52 0.121(18) 0.126(16) 0.223(28) -0.087(19) 0.033(18) -0.032(14) 
 
_geom_special_details 
; 
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
; 
 
loop_ 
 _geom_bond_atom_site_label_1 
 _geom_bond_atom_site_label_2 
 _geom_bond_distance 
 _geom_bond_site_symmetry_2 
 _geom_bond_publ_flag 
Sn1 N2 2.218(8) 2_565 ? 
Sn1 N2 2.218(7) . ? 
Sn1 P1 2.579(4) . ? 
Sn2 N1 2.192(10) . ? 
Sn2 N2 2.217(8) . ? 
Sn2 N2 2.217(8) 2_565 ? 
Sn3 N1 2.204(6) . ? 
Sn3 N2 2.235(7) . ? 
Sn3 P1 2.723(3) . ? 
Sn4 N4 2.177(7) . ? 
Sn4 N3 2.201(7) . ? 
Sn4 P1 2.631(3) . ? 
Sn5 N4 2.189(7) 2_565 ? 
Sn5 N4 2.189(7) . ? 
Sn5 N3 2.217(11) . ? 
Sn6 O1 1.980(9) . ? 
Sn6 N4 2.267(8) . ? 
Sn6 N4 2.267(8) 2_565 ? 
P1 Sn4 2.631(3) 2_565 ? 
P1 Sn3 2.723(3) 2_565 ? 
N1 C1 1.55(2) . ? 
N1 Sn3 2.204(6) 2_565 ? 
C1 C12 1.55(2) . ? 
C1 C12 1.55(2) 2_565 ? 
C1 C11 1.55(2) . ? 
N2 C2 1.476(12) . ? 
C2 C23 1.509(15) . ? 
C2 C21 1.537(14) . ? 
C2 C22 1.595(13) . ? 
N3 C3 1.48(2) . ? 
N3 Sn4 2.201(7) 2_565 ? 
C3 C32 1.492(14) . ? 
C3 C32 1.492(14) 2_565 ? 
C3 C31 1.57(2) . ? 
N4 C4 1.528(11) . ? 
C4 C42 1.513(14) . ? 
C4 C43 1.554(14) . ? 
C4 C41 1.565(15) . ? 
Si1 O1 1.640(11) . ? 
Si1 C51 1.75(3) . ? 
Si1 C52 1.87(2) . ? 
Si1 C52 1.87(2) 2_565 ? 
 
loop_ 
 _geom_angle_atom_site_label_1 
 _geom_angle_atom_site_label_2 
 _geom_angle_atom_site_label_3 
 _geom_angle 
 _geom_angle_site_symmetry_1 
 _geom_angle_site_symmetry_3 
 _geom_angle_publ_flag 
N2 Sn1 N2 80.9(4) 2_565 . ? 
N2 Sn1 P1 85.9(2) 2_565 . ? 
N2 Sn1 P1 85.9(2) . . ? 
N1 Sn2 N2 81.3(3) . . ? 
N1 Sn2 N2 81.3(3) . 2_565 ? 
N2 Sn2 N2 80.9(4) . 2_565 ? 
N1 Sn3 N2 80.6(3) . . ? 
N1 Sn3 P1 90.0(2) . . ? 
N2 Sn3 P1 82.2(2) . . ? 
N4 Sn4 N3 81.6(3) . . ? 
N4 Sn4 P1 98.3(2) . . ? 
N3 Sn4 P1 85.6(3) . . ? 
N4 Sn5 N4 81.6(4) 2_565 . ? 
N4 Sn5 N3 80.9(3) 2_565 . ? 
N4 Sn5 N3 80.9(3) . . ? 
O1 Sn6 N4 99.9(3) . . ? 
O1 Sn6 N4 99.9(3) . 2_565 ? 
N4 Sn6 N4 78.2(3) . 2_565 ? 
Sn1 P1 Sn4 117.99(11) . . ? 
Sn1 P1 Sn4 117.99(11) . 2_565 ? 
Sn4 P1 Sn4 82.67(11) . 2_565 ? 
Sn1 P1 Sn3 84.87(10) . 2_565 ? 
Sn4 P1 Sn3 155.4(2) . 2_565 ? 
Sn4 P1 Sn3 94.70(5) 2_565 2_565 ? 
Sn1 P1 Sn3 84.87(10) . . ? 
Sn4 P1 Sn3 94.70(5) . . ? 
Sn4 P1 Sn3 155.4(2) 2_565 . ? 
Sn3 P1 Sn3 77.58(11) 2_565 . ? 
C1 N1 Sn2 118.6(8) . . ? 
C1 N1 Sn3 117.7(4) . . ? 
Sn2 N1 Sn3 98.9(3) . . ? 
C1 N1 Sn3 117.7(4) . 2_565 ? 
Sn2 N1 Sn3 98.9(3) . 2_565 ? 
Sn3 N1 Sn3 101.5(4) . 2_565 ? 
C12 C1 C12 110.0(15) . 2_565 ? 
C12 C1 N1 105.0(8) . . ? 
C12 C1 N1 105.0(8) 2_565 . ? 
C12 C1 C11 113.2(8) . . ? 
C12 C1 C11 113.2(8) 2_565 . ? 
N1 C1 C11 109.8(12) . . ? 
C2 N2 Sn2 119.0(5) . . ? 
C2 N2 Sn1 116.7(6) . . ? 
Sn2 N2 Sn1 97.1(3) . . ? 
C2 N2 Sn3 116.6(6) . . ? 
Sn2 N2 Sn3 97.3(3) . . ? 
Sn1 N2 Sn3 107.0(3) . . ? 
N2 C2 C23 109.6(8) . . ? 
N2 C2 C21 110.7(8) . . ? 
C23 C2 C21 110.0(8) . . ? 
N2 C2 C22 107.7(7) . . ? 
C23 C2 C22 109.8(10) . . ? 
C21 C2 C22 109.1(8) . . ? 
C3 N3 Sn4 118.5(4) . 2_565 ? 
C3 N3 Sn4 118.5(4) . . ? 
Sn4 N3 Sn4 104.3(5) 2_565 . ? 
C3 N3 Sn5 117.7(8) . . ? 
Sn4 N3 Sn5 96.8(3) 2_565 . ? 
Sn4 N3 Sn5 96.8(3) . . ? 
N3 C3 C32 113.0(7) . . ? 
N3 C3 C32 113.0(7) . 2_565 ? 
C32 C3 C32 107.5(13) . 2_565 ? 
N3 C3 C31 108.8(11) . . ? 
C32 C3 C31 107.1(8) . . ? 
C32 C3 C31 107.1(8) 2_565 . ? 
C4 N4 Sn4 113.5(6) . . ? 
C4 N4 Sn5 117.5(5) . . ? 
Sn4 N4 Sn5 98.4(3) . . ? 
C4 N4 Sn6 118.7(5) . . ? 
Sn4 N4 Sn6 108.0(3) . . ? 
Sn5 N4 Sn6 97.9(3) . . ? 
C42 C4 N4 108.3(7) . . ? 
C42 C4 C43 109.9(9) . . ? 
N4 C4 C43 109.3(8) . . ? 
C42 C4 C41 110.8(10) . . ? 
N4 C4 C41 111.7(8) . . ? 
C43 C4 C41 106.9(8) . . ? 
O1 Si1 C51 109.5(10) . . ? 
O1 Si1 C52 111.2(8) . . ? 
C51 Si1 C52 108.4(10) . . ? 
O1 Si1 C52 111.2(8) . 2_565 ? 
C51 Si1 C52 108.4(10) . 2_565 ? 
C52 Si1 C52 108.1(17) . 2_565 ? 
Si1 O1 Sn6 140.8(7) . . ? 
 
_refine_diff_density_max    1.799 
_refine_diff_density_min   -1.125 
_refine_diff_density_rms    0.153