# Supplementary Material (ESI) for ChemComm # This journal is © The Royal Society of Chemistry 2000 # CCDC Number: 182/1840 data_fidi1 _audit_creation_method SHELXL-97 _chemical_name_systematic ; ? ; _chemical_name_common ? _chemical_melting_point ? _chemical_formula_moiety ? _chemical_formula_sum 'C33 H48 N2 O5 P2 Si4 W1' _chemical_formula_weight 910.90 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' 'O' 'O' 0.0106 0.0060 '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' 'W' 'W' -0.8490 6.8722 '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' _symmetry_cell_setting monoclinic _symmetry_space_group_name_H-M P2/n loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, y, -z+1/2' '-x, -y, -z' 'x-1/2, -y, z-1/2' _cell_length_a 18.440(3) _cell_length_b 9.831(3) _cell_length_c 25.145(4) _cell_angle_alpha 90.00 _cell_angle_beta 111.491(10) _cell_angle_gamma 90.00 _cell_volume 4241.3(16) _cell_formula_units_Z 4 _cell_measurement_temperature 173(2) _cell_measurement_reflns_used 47 _cell_measurement_theta_min 2.5 _cell_measurement_theta_max 12.5 _exptl_crystal_description 'cut prism' _exptl_crystal_colour 'pale yellow' _exptl_crystal_size_max 0.80 _exptl_crystal_size_mid 0.20 _exptl_crystal_size_min 0.15 _exptl_crystal_density_meas ? _exptl_crystal_density_diffrn 1.426 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 1840 _exptl_absorpt_coefficient_mu 2.949 _exptl_absorpt_correction_type Psi-scans _exptl_absorpt_correction_T_min 0.2557 _exptl_absorpt_correction_T_max 0.3231 _exptl_absorpt_process_details ? _exptl_special_details ; ? ; _diffrn_ambient_temperature 173(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_type 'Siemens P4' _diffrn_measurement_method \w-scans _diffrn_detector_area_resol_mean ? _diffrn_standards_number 3 _diffrn_standards_interval_count 247 _diffrn_standards_interval_time ? _diffrn_standards_decay_% 2 _diffrn_reflns_number 12772 _diffrn_reflns_av_R_equivalents 0.1151 _diffrn_reflns_av_sigmaI/netI 0.2268 _diffrn_reflns_limit_h_min -20 _diffrn_reflns_limit_h_max 21 _diffrn_reflns_limit_k_min -11 _diffrn_reflns_limit_k_max 11 _diffrn_reflns_limit_l_min -29 _diffrn_reflns_limit_l_max 10 _diffrn_reflns_theta_min 3.03 _diffrn_reflns_theta_max 24.99 _reflns_number_total 7430 _reflns_number_gt 3410 _reflns_threshold_expression >2sigma(I) _computing_data_collection 'Siemens XSCANS' _computing_cell_refinement 'Siemens XSCANS' _computing_data_reduction 'Siemens XSCANS' _computing_structure_solution 'SHELXS-97 (Sheldrick, 1990)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_molecular_graphics 'Siemens XP' _computing_publication_material 'SHELXS-97 (Sheldrick, 1990)' _refine_special_details ; Refinement of F^2^ against ALL reflections. The weighted R-factor wR and goodness 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 threshold expression of F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) 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. The methyl groups at Si3 and Si4 are slightly disorderd. ; _refine_ls_structure_factor_coef Fsqd _refine_ls_matrix_type full _refine_ls_weighting_scheme calc _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0001P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' _atom_sites_solution_primary Patterson _atom_sites_solution_secondary difmap _atom_sites_solution_hydrogens geom _refine_ls_hydrogen_treatment 'all riding' _refine_ls_extinction_method none _refine_ls_extinction_coef ? _refine_ls_number_reflns 7430 _refine_ls_number_parameters 424 _refine_ls_number_restraints 171 _refine_ls_R_factor_all 0.1494 _refine_ls_R_factor_gt 0.0537 _refine_ls_wR_factor_ref 0.0731 _refine_ls_wR_factor_gt 0.0581 _refine_ls_goodness_of_fit_ref 0.763 _refine_ls_restrained_S_all 0.756 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_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_adp_type _atom_site_occupancy _atom_site_symmetry_multiplicity _atom_site_calc_flag _atom_site_refinement_flags _atom_site_disorder_assembly _atom_site_disorder_group W W 0.78540(3) 0.53286(4) 0.886220(19) 0.03567(11) Uani 1 1 d . . . Si1 Si 0.65161(17) 1.0055(3) 0.82221(11) 0.0494(9) Uani 1 1 d . . . Si2 Si 0.54020(17) 0.7419(3) 0.80187(12) 0.0459(8) Uani 1 1 d . . . Si3 Si 0.74635(19) 0.9421(3) 1.11754(13) 0.0599(10) Uani 1 1 d . . . Si4 Si 0.85143(19) 0.6644(3) 1.15812(14) 0.0608(10) Uani 1 1 d . . . P1 P 0.70776(15) 0.7372(2) 0.89480(10) 0.0318(7) Uani 1 1 d U . . P2 P 0.77772(15) 0.7249(2) 1.02903(11) 0.0346(7) Uani 1 1 d . . . N1 N 0.6462(4) 0.7216(7) 0.9314(3) 0.036(2) Uani 1 1 d U . . N2 N 0.7710(4) 0.8604(6) 0.9312(3) 0.0298(19) Uani 1 1 d U . . O1 O 0.6619(4) 0.4248(7) 0.7695(3) 0.068(2) Uani 1 1 d U . . O2 O 0.8923(4) 0.2932(7) 0.8747(3) 0.068(2) Uani 1 1 d U . . O3 O 0.8383(4) 0.7342(8) 0.8083(3) 0.071(2) Uani 1 1 d U . . O4 O 0.9353(4) 0.6031(7) 0.9953(3) 0.049(2) Uani 1 1 d U . . O5 O 0.7111(4) 0.3760(6) 0.9644(3) 0.064(2) Uani 1 1 d U . . C1 C 0.7047(6) 0.4669(12) 0.8137(4) 0.051(3) Uani 1 1 d U . . C2 C 0.8520(6) 0.3808(9) 0.8788(4) 0.045(3) Uani 1 1 d U . . C3 C 0.8226(6) 0.6596(11) 0.8378(4) 0.052(3) Uani 1 1 d U . . C4 C 0.8797(6) 0.5823(10) 0.9573(4) 0.040(3) Uani 1 1 d U . . C5 C 0.7376(6) 0.4304(10) 0.9354(4) 0.051(3) Uani 1 1 d U . . C6 C 0.6451(5) 0.8107(8) 0.8285(3) 0.032(2) Uani 1 1 d . . . H6 H 0.6664 0.7750 0.8000 0.039 Uiso 1 1 calc R . . C7 C 0.7510(5) 1.0531(9) 0.8264(4) 0.066(3) Uani 1 1 d . . . H7A H 0.7892 1.0254 0.8635 0.079 Uiso 1 1 calc R . . H7B H 0.7537 1.1518 0.8221 0.079 Uiso 1 1 calc R . . H7C H 0.7626 1.0073 0.7958 0.079 Uiso 1 1 calc R . . C8 C 0.5845(6) 1.0612(9) 0.7503(4) 0.072(4) Uani 1 1 d . . . H8A H 0.5308 1.0383 0.7455 0.087 Uiso 1 1 calc R . . H8B H 0.5984 1.0148 0.7208 0.087 Uiso 1 1 calc R . . H8C H 0.5891 1.1598 0.7466 0.087 Uiso 1 1 calc R . . C9 C 0.6256(6) 1.0946(8) 0.8800(4) 0.073(4) Uani 1 1 d . . . H9A H 0.5732 1.0670 0.8771 0.087 Uiso 1 1 calc R . . H9B H 0.6269 1.1933 0.8750 0.087 Uiso 1 1 calc R . . H9C H 0.6633 1.0692 0.9177 0.087 Uiso 1 1 calc R . . C10 C 0.5032(6) 0.7369(10) 0.7216(4) 0.064(3) Uani 1 1 d . . . H10A H 0.5376 0.6795 0.7092 0.077 Uiso 1 1 calc R . . H10B H 0.5024 0.8292 0.7067 0.077 Uiso 1 1 calc R . . H10C H 0.4504 0.6991 0.7069 0.077 Uiso 1 1 calc R . . C11 C 0.4748(5) 0.8511(9) 0.8262(4) 0.065(3) Uani 1 1 d . . . H11A H 0.4941 0.8524 0.8680 0.078 Uiso 1 1 calc R . . H11B H 0.4218 0.8141 0.8113 0.078 Uiso 1 1 calc R . . H11C H 0.4744 0.9440 0.8119 0.078 Uiso 1 1 calc R . . C12 C 0.5320(5) 0.5629(9) 0.8247(4) 0.060(3) Uani 1 1 d . . . H12A H 0.5659 0.5035 0.8127 0.072 Uiso 1 1 calc R . . H12B H 0.4779 0.5321 0.8069 0.072 Uiso 1 1 calc R . . H12C H 0.5480 0.5595 0.8664 0.072 Uiso 1 1 calc R . . C13 C 0.6734(6) 0.7196(8) 0.9861(4) 0.033(2) Uani 1 1 d U . . C14 C 0.6146(6) 0.6929(10) 1.0140(4) 0.041(3) Uani 1 1 d U . . C15 C 0.6213(6) 0.5831(9) 1.0494(4) 0.057(3) Uani 1 1 d U . . H15 H 0.6647 0.5241 1.0570 0.069 Uiso 1 1 calc R . . C16 C 0.5674(7) 0.5548(11) 1.0743(4) 0.071(4) Uani 1 1 d U . . H16 H 0.5736 0.4794 1.0992 0.085 Uiso 1 1 calc R . . C17 C 0.5041(7) 0.6414(12) 1.0614(5) 0.081(4) Uani 1 1 d U . . H17 H 0.4660 0.6239 1.0777 0.097 Uiso 1 1 calc R . . C18 C 0.4944(6) 0.7500(11) 1.0263(5) 0.066(3) Uani 1 1 d U . . H18 H 0.4499 0.8068 1.0181 0.079 Uiso 1 1 calc R . . C19 C 0.5508(6) 0.7784(10) 1.0021(4) 0.049(3) Uani 1 1 d U . . H19 H 0.5450 0.8551 0.9779 0.059 Uiso 1 1 calc R . . C20 C 0.8016(5) 0.8607(8) 0.9853(4) 0.029(2) Uani 1 1 d U . . C21 C 0.8652(5) 0.9573(11) 1.0151(3) 0.0280(19) Uani 1 1 d U . . C22 C 0.9376(6) 0.9191(9) 1.0533(4) 0.041(3) Uani 1 1 d U . . H22 H 0.9469 0.8254 1.0625 0.049 Uiso 1 1 calc R . . C23 C 0.9958(6) 1.0083(11) 1.0781(4) 0.053(3) Uani 1 1 d U . . H23 H 1.0450 0.9780 1.1038 0.064 Uiso 1 1 calc R . . C24 C 0.9819(7) 1.1460(12) 1.0650(4) 0.064(4) Uani 1 1 d U . . H24 H 1.0211 1.2115 1.0831 0.076 Uiso 1 1 calc R . . C25 C 0.9105(7) 1.1866(11) 1.0255(4) 0.063(3) Uani 1 1 d U . . H25 H 0.9019 1.2798 1.0152 0.075 Uiso 1 1 calc R . . C26 C 0.8532(6) 1.0954(10) 1.0015(4) 0.045(3) Uani 1 1 d U . . H26 H 0.8043 1.1252 0.9750 0.054 Uiso 1 1 calc R . . C27 C 0.7972(6) 0.7928(9) 1.1017(4) 0.062(3) Uani 1 1 d . . . H27 H 0.8448 0.8448 1.1039 0.074 Uiso 1 1 calc R . . C28 C 0.8199(8) 1.0607(12) 1.1651(5) 0.163(7) Uani 1 1 d . . . H28A H 0.7934 1.1383 1.1745 0.196 Uiso 1 1 calc R . . H28B H 0.8539 1.0932 1.1457 0.196 Uiso 1 1 calc R . . H28C H 0.8512 1.0134 1.2004 0.196 Uiso 1 1 calc R . . C29 C 0.6780(7) 0.8877(11) 1.1524(4) 0.120(6) Uani 1 1 d . . . H29A H 0.6394 0.8248 1.1272 0.144 Uiso 1 1 calc R . . H29B H 0.6514 0.9676 1.1598 0.144 Uiso 1 1 calc R . . H29C H 0.7072 0.8421 1.1886 0.144 Uiso 1 1 calc R . . C30 C 0.6918(5) 1.0430(10) 1.0524(3) 0.070(3) Uani 1 1 d . . . H30A H 0.6523 0.9853 1.0250 0.084 Uiso 1 1 calc R . . H30B H 0.7281 1.0763 1.0351 0.084 Uiso 1 1 calc R . . H30C H 0.6664 1.1204 1.0630 0.084 Uiso 1 1 calc R . . C31 C 0.7961(6) 0.5152(14) 1.1606(6) 0.181(8) Uani 1 1 d . . . H31A H 0.7795 0.4686 1.1236 0.217 Uiso 1 1 calc R . . H31B H 0.7502 0.5420 1.1689 0.217 Uiso 1 1 calc R . . H31C H 0.8286 0.4539 1.1906 0.217 Uiso 1 1 calc R . . C32 C 0.8786(9) 0.7422(15) 1.2314(5) 0.165(8) Uani 1 1 d . . . H32A H 0.9098 0.8243 1.2337 0.198 Uiso 1 1 calc R . . H32B H 0.9091 0.6766 1.2603 0.198 Uiso 1 1 calc R . . H32C H 0.8311 0.7660 1.2382 0.198 Uiso 1 1 calc R . . C33 C 0.9444(6) 0.6212(10) 1.1505(5) 0.103(5) Uani 1 1 d . . . H33A H 0.9729 0.7049 1.1498 0.123 Uiso 1 1 calc R . . H33B H 0.9340 0.5710 1.1148 0.123 Uiso 1 1 calc R . . H33C H 0.9758 0.5648 1.1829 0.123 Uiso 1 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 W 0.0383(2) 0.03194(19) 0.0408(2) -0.0016(3) 0.0193(2) 0.0002(3) Si1 0.054(2) 0.042(3) 0.0362(17) 0.0040(14) -0.0024(16) -0.0062(17) Si2 0.034(2) 0.060(2) 0.0421(19) -0.0011(16) 0.0123(17) -0.0037(18) Si3 0.069(3) 0.068(2) 0.0391(18) -0.0082(19) 0.016(2) 0.011(2) Si4 0.050(2) 0.087(3) 0.050(2) 0.035(2) 0.024(2) 0.019(2) P1 0.0368(18) 0.0312(16) 0.0302(15) 0.0010(12) 0.0155(14) -0.0006(14) P2 0.0390(18) 0.0354(16) 0.0346(15) 0.0068(13) 0.0196(15) 0.0021(15) N1 0.043(6) 0.029(5) 0.039(4) -0.001(4) 0.020(5) -0.004(4) N2 0.036(5) 0.019(4) 0.035(4) 0.002(4) 0.013(4) -0.002(4) O1 0.068(6) 0.071(6) 0.057(5) -0.015(4) 0.015(5) -0.007(5) O2 0.062(6) 0.043(5) 0.095(6) -0.012(5) 0.025(5) 0.006(4) O3 0.059(6) 0.105(6) 0.059(5) 0.031(5) 0.033(5) -0.003(5) O4 0.037(5) 0.054(5) 0.059(5) -0.001(4) 0.020(4) 0.009(4) O5 0.075(6) 0.044(5) 0.088(6) 0.007(4) 0.047(5) -0.007(4) C1 0.065(8) 0.042(6) 0.050(6) 0.013(7) 0.025(6) 0.003(7) C2 0.056(9) 0.032(7) 0.045(7) -0.002(6) 0.015(7) -0.015(6) C3 0.037(7) 0.076(9) 0.044(7) -0.004(6) 0.015(6) -0.001(7) C4 0.034(7) 0.042(7) 0.056(7) 0.011(6) 0.030(5) -0.002(6) C5 0.040(7) 0.050(8) 0.068(8) -0.002(6) 0.025(6) 0.011(6) C6 0.045(7) 0.028(6) 0.030(6) -0.005(4) 0.021(5) -0.004(5) C7 0.088(9) 0.050(7) 0.049(6) 0.017(6) 0.013(7) -0.029(7) C8 0.085(9) 0.049(8) 0.071(8) 0.018(7) 0.016(7) -0.009(7) C9 0.093(10) 0.035(7) 0.076(9) -0.018(6) 0.015(8) -0.001(7) C10 0.051(8) 0.073(8) 0.051(7) -0.012(6) -0.001(6) -0.033(7) C11 0.044(8) 0.099(9) 0.048(7) -0.005(7) 0.012(7) -0.002(7) C12 0.056(8) 0.070(8) 0.064(7) -0.012(6) 0.036(7) -0.029(7) C13 0.054(7) 0.019(5) 0.039(5) -0.004(5) 0.033(6) 0.001(5) C14 0.038(6) 0.053(7) 0.040(6) 0.007(5) 0.022(5) -0.004(5) C15 0.062(8) 0.052(7) 0.065(7) 0.023(5) 0.033(6) 0.005(6) C16 0.088(9) 0.060(8) 0.089(8) 0.030(7) 0.062(8) 0.006(7) C17 0.060(9) 0.099(10) 0.100(10) 0.035(7) 0.051(8) 0.006(7) C18 0.036(7) 0.093(9) 0.075(9) 0.019(6) 0.028(7) 0.007(7) C19 0.039(7) 0.068(8) 0.050(7) 0.020(6) 0.026(6) 0.013(5) C20 0.032(6) 0.023(5) 0.027(5) -0.002(4) 0.007(5) 0.007(4) C21 0.029(5) 0.032(5) 0.026(5) 0.000(5) 0.015(4) -0.001(5) C22 0.044(6) 0.045(6) 0.025(6) -0.004(4) 0.002(5) -0.004(5) C23 0.040(6) 0.082(9) 0.029(5) -0.003(5) 0.002(5) -0.007(5) C24 0.066(8) 0.083(7) 0.035(7) 0.002(6) 0.011(6) -0.041(7) C25 0.088(9) 0.044(6) 0.040(7) 0.013(5) 0.005(6) -0.025(6) C26 0.063(7) 0.037(5) 0.024(6) 0.000(5) 0.005(5) -0.015(5) C27 0.093(10) 0.062(8) 0.033(6) 0.015(6) 0.026(7) 0.024(7) C28 0.224(18) 0.081(12) 0.095(11) -0.038(9) -0.047(11) -0.012(13) C29 0.113(12) 0.202(15) 0.062(9) 0.045(9) 0.053(9) 0.114(11) C30 0.082(9) 0.062(7) 0.051(7) 0.006(7) 0.007(7) 0.041(8) C31 0.068(11) 0.177(17) 0.234(17) 0.165(15) -0.020(11) -0.019(12) C32 0.23(2) 0.202(17) 0.053(10) 0.040(10) 0.039(12) 0.106(16) C33 0.070(10) 0.129(12) 0.111(11) 0.061(9) 0.037(9) 0.052(9) _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 W C2 1.986(10) . ? W C1 1.993(11) . ? W C3 2.029(10) . ? W C5 2.030(10) . ? W C4 2.044(11) . ? W P1 2.521(2) . ? Si1 C7 1.857(9) . ? Si1 C8 1.861(9) . ? Si1 C9 1.903(8) . ? Si1 C6 1.929(8) . ? Si2 C12 1.874(9) . ? Si2 C11 1.876(8) . ? Si2 C10 1.880(8) . ? Si2 C6 1.923(9) . ? Si3 C28 1.855(12) . ? Si3 C29 1.858(10) . ? Si3 C27 1.861(9) . ? Si3 C30 1.862(9) . ? Si4 C31 1.800(12) . ? Si4 C33 1.843(10) . ? Si4 C32 1.885(12) . ? Si4 C27 1.889(9) . ? P1 N2 1.698(7) . ? P1 N1 1.710(7) . ? P1 C6 1.796(8) . ? P2 C13 1.829(10) . ? P2 C27 1.852(9) . ? P2 C20 1.882(9) . ? N1 C13 1.280(9) . ? N2 C20 1.267(9) . ? O1 C1 1.177(10) . ? O2 C2 1.167(10) . ? O3 C3 1.153(10) . ? O4 C4 1.135(10) . ? O5 C5 1.148(9) . ? C13 C14 1.514(11) . ? C14 C15 1.375(11) . ? C14 C19 1.388(12) . ? C15 C16 1.384(11) . ? C16 C17 1.383(14) . ? C17 C18 1.355(13) . ? C18 C19 1.413(10) . ? C20 C21 1.482(12) . ? C21 C22 1.379(11) . ? C21 C26 1.398(10) . ? C22 C23 1.349(11) . ? C23 C24 1.394(12) . ? C24 C25 1.386(14) . ? C25 C26 1.348(12) . ? 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 C2 W C1 87.1(4) . . ? C2 W C3 92.9(4) . . ? C1 W C3 87.4(4) . . ? C2 W C5 96.0(4) . . ? C1 W C5 92.9(4) . . ? C3 W C5 171.1(4) . . ? C2 W C4 84.5(4) . . ? C1 W C4 171.2(4) . . ? C3 W C4 90.7(4) . . ? C5 W C4 90.3(4) . . ? C2 W P1 176.0(3) . . ? C1 W P1 94.6(3) . . ? C3 W P1 83.7(3) . . ? C5 W P1 87.5(3) . . ? C4 W P1 93.7(3) . . ? C7 Si1 C8 105.8(4) . . ? C7 Si1 C9 111.1(5) . . ? C8 Si1 C9 110.1(5) . . ? C7 Si1 C6 109.6(4) . . ? C8 Si1 C6 109.4(4) . . ? C9 Si1 C6 110.7(4) . . ? C12 Si2 C11 107.7(4) . . ? C12 Si2 C10 105.4(4) . . ? C11 Si2 C10 110.0(4) . . ? C12 Si2 C6 114.0(4) . . ? C11 Si2 C6 111.7(4) . . ? C10 Si2 C6 107.8(4) . . ? C28 Si3 C29 109.8(5) . . ? C28 Si3 C27 109.1(6) . . ? C29 Si3 C27 110.9(5) . . ? C28 Si3 C30 105.3(5) . . ? C29 Si3 C30 109.1(4) . . ? C27 Si3 C30 112.6(4) . . ? C31 Si4 C33 112.1(6) . . ? C31 Si4 C32 104.4(7) . . ? C33 Si4 C32 105.7(6) . . ? C31 Si4 C27 114.8(5) . . ? C33 Si4 C27 109.4(5) . . ? C32 Si4 C27 110.0(5) . . ? N2 P1 N1 103.6(3) . . ? N2 P1 C6 107.1(4) . . ? N1 P1 C6 102.0(4) . . ? N2 P1 W 108.4(3) . . ? N1 P1 W 119.0(2) . . ? C6 P1 W 115.7(3) . . ? C13 P2 C27 112.0(4) . . ? C13 P2 C20 95.5(4) . . ? C27 P2 C20 108.6(4) . . ? C13 N1 P1 120.2(7) . . ? C20 N2 P1 121.9(6) . . ? O1 C1 W 174.6(9) . . ? O2 C2 W 178.7(9) . . ? O3 C3 W 175.1(10) . . ? O4 C4 W 174.8(9) . . ? O5 C5 W 177.8(9) . . ? P1 C6 Si2 113.9(4) . . ? P1 C6 Si1 115.9(5) . . ? Si2 C6 Si1 113.9(5) . . ? N1 C13 C14 115.8(9) . . ? N1 C13 P2 123.2(7) . . ? C14 C13 P2 120.5(7) . . ? C15 C14 C19 118.9(9) . . ? C15 C14 C13 121.8(9) . . ? C19 C14 C13 119.3(8) . . ? C14 C15 C16 122.9(10) . . ? C17 C16 C15 117.0(10) . . ? C18 C17 C16 122.5(11) . . ? C17 C18 C19 119.6(11) . . ? C14 C19 C18 119.2(10) . . ? N2 C20 C21 120.3(8) . . ? N2 C20 P2 121.2(7) . . ? C21 C20 P2 118.0(6) . . ? C22 C21 C26 117.4(10) . . ? C22 C21 C20 124.2(10) . . ? C26 C21 C20 118.2(9) . . ? C23 C22 C21 123.2(10) . . ? C22 C23 C24 118.4(10) . . ? C25 C24 C23 119.5(11) . . ? C26 C25 C24 120.8(11) . . ? C25 C26 C21 120.5(11) . . ? P2 C27 Si3 124.4(5) . . ? P2 C27 Si4 111.0(5) . . ? Si3 C27 Si4 122.4(5) . . ? _diffrn_measured_fraction_theta_max 0.995 _diffrn_reflns_theta_full 24.99 _diffrn_measured_fraction_theta_full 0.995 _refine_diff_density_max 1.162 _refine_diff_density_min -0.712 _refine_diff_density_rms 0.132