#------------------------------------------------------------------------------ #$Date: 2012-03-31 02:27:19 +0100 (Sat, 31 Mar 2012) $ #$Revision: 50619 $ #$URL: svn://www.crystallography.net/cod/cif/4/07/56/4075681.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/ # # All data on this site have been placed in the public domain by the # contributors. # data_4075681 loop_ _publ_author_name 'Wagler, J\"org' 'B\"ohme, Uwe' 'Brendler, Erica' 'Roewer, Gerhard' _publ_contact_author ;Wagler, J\"org Institut f\"ur Anorganische Chemie Technische Universit\"at Bergakademie Freiberg Leipziger Str. 29 09596 Freiberg Bundesrepublik Deutschland ; _publ_section_title ; Equilibrium between Tetra-, Penta-, and Hexacoordinate Imine and Enamine Chelates of Silicon:  Crystal Structure and Variable-Temperature NMR ; _journal_issue 6 _journal_name_full Organometallics _journal_page_first 1348 _journal_volume 24 _journal_year 2005 _chemical_formula_moiety 'C24 H24 N2 O2 Si' _chemical_formula_sum 'C24 H24 N2 O2 Si' _chemical_formula_weight 400.54 _chemical_melting_point 374 _chemical_name_common (Salme*)(Salme*-H)SiPh _chemical_name_systematic ; (N,O)-N-Methyl-o-oxyacetophenoneiminato-(N',O')-N'-methyl-N'-1-(2-oxyphenyl)- vinylaminatophenylsilicon ; _space_group_IT_number 14 _symmetry_cell_setting monoclinic _symmetry_space_group_name_Hall '-P 2yn' _symmetry_space_group_name_H-M 'P 1 21/n 1' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 90.00 _cell_angle_beta 100.385(10) _cell_angle_gamma 90.00 _cell_formula_units_Z 4 _cell_length_a 8.8530(10) _cell_length_b 17.0160(10) _cell_length_c 14.010(2) _cell_measurement_reflns_used 218 _cell_measurement_temperature 198(2) _cell_measurement_theta_max 20.889 _cell_measurement_theta_min 3.604 _cell_volume 2075.9(4) _computing_cell_refinement 'Dirax/lsq (Duisenb. & Schr., 1989-2000)' _computing_data_collection 'Collect (Nonius BV, 1997-2000)' _computing_data_reduction 'EvalCCD (Duisenb. & Schr., 1990-2000)' _computing_molecular_graphics 'Ortep32 (Farugia)' _computing_publication_material 'Ciftab (Sheldrick)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS-97 (Sheldrick, 1990)' _diffrn_ambient_temperature 198(2) _diffrn_detector_area_resol_mean 9 _diffrn_measured_fraction_theta_full 0.995 _diffrn_measured_fraction_theta_max 0.995 _diffrn_measurement_device_type KappaCCD _diffrn_measurement_method CCD _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0749 _diffrn_reflns_av_sigmaI/netI 0.0355 _diffrn_reflns_limit_h_max 9 _diffrn_reflns_limit_h_min -9 _diffrn_reflns_limit_k_max 18 _diffrn_reflns_limit_k_min -18 _diffrn_reflns_limit_l_max 15 _diffrn_reflns_limit_l_min -15 _diffrn_reflns_number 23039 _diffrn_reflns_theta_full 22.99 _diffrn_reflns_theta_max 22.99 _diffrn_reflns_theta_min 3.63 _exptl_absorpt_coefficient_mu 0.136 _exptl_absorpt_correction_T_max 0.9655 _exptl_absorpt_correction_T_min 0.9439 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details SADABS _exptl_crystal_colour yellow _exptl_crystal_density_diffrn 1.282 _exptl_crystal_density_method 'not measured' _exptl_crystal_description block _exptl_crystal_F_000 848 _exptl_crystal_size_max 0.43 _exptl_crystal_size_mid 0.39 _exptl_crystal_size_min 0.26 _refine_diff_density_max 0.235 _refine_diff_density_min -0.231 _refine_diff_density_rms 0.037 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.016 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 262 _refine_ls_number_reflns 2877 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.016 _refine_ls_R_factor_all 0.0663 _refine_ls_R_factor_gt 0.0400 _refine_ls_shift/su_max 0.000 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0531P)^2^+0.6427P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0942 _refine_ls_wR_factor_ref 0.1033 _reflns_number_gt 2107 _reflns_number_total 2877 _reflns_threshold_expression >2sigma(I) _[local]_cod_data_source_file om049115ssi20041116_105720.cif _[local]_cod_data_source_block compound_2 _[local]_cod_cif_authors_sg_H-M P2(1)/n _[local]_cod_cif_authors_sg_Hall -P2yn _cod_depositor_comments ; The following automatic conversions were performed: '_chemical_melting_point' value '374 K' was changed to '374' - the value should be numeric and without a unit designator. '_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic' according to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29. Automatic conversion script Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana ; _cod_database_code 4075681 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, y+1/2, -z+1/2' '-x, -y, -z' 'x-1/2, -y-1/2, z-1/2' 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 Si1 Si 0.16615(8) 0.65250(4) 0.14276(5) 0.0327(2) Uani 1 1 d . N1 N 0.2153(2) 0.63188(12) 0.27089(14) 0.0377(5) Uani 1 1 d . N2 N 0.1262(2) 0.67083(11) -0.00655(13) 0.0309(5) Uani 1 1 d . O1 O 0.2512(2) 0.57394(9) 0.10704(12) 0.0369(4) Uani 1 1 d . O2 O 0.2563(2) 0.73867(10) 0.15523(12) 0.0391(5) Uani 1 1 d . C1 C 0.3384(3) 0.51673(13) 0.15936(18) 0.0325(6) Uani 1 1 d . C2 C 0.3842(3) 0.45558(14) 0.10508(19) 0.0394(6) Uani 1 1 d . H2A H 0.3505 0.4542 0.0368 0.047 Uiso 1 1 d R C3 C 0.4777(3) 0.39728(16) 0.1502(2) 0.0488(7) Uani 1 1 d . H3A H 0.5094 0.3556 0.1132 0.059 Uiso 1 1 d R C4 C 0.5259(4) 0.39930(16) 0.2497(2) 0.0523(8) Uani 1 1 d . H4A H 0.5913 0.3592 0.2812 0.063 Uiso 1 1 d R C5 C 0.4786(3) 0.45969(15) 0.3030(2) 0.0434(7) Uani 1 1 d . H5A H 0.5113 0.4599 0.3715 0.052 Uiso 1 1 d R C6 C 0.3842(3) 0.52072(13) 0.25969(17) 0.0330(6) Uani 1 1 d . C7 C 0.3336(3) 0.58564(14) 0.31760(18) 0.0357(6) Uani 1 1 d . C8 C 0.4003(4) 0.59625(19) 0.4111(2) 0.0702(11) Uani 1 1 d . H8A H 0.4822 0.5613 0.4406 0.084 Uiso 1 1 d R H8B H 0.3551 0.6428 0.4455 0.084 Uiso 1 1 d R C9 C 0.1611(4) 0.69031(17) 0.3334(2) 0.0534(8) Uani 1 1 d . H9A H 0.1314 0.6643 0.3879 0.080 Uiso 1 1 d R H9B H 0.0743 0.7178 0.2975 0.080 Uiso 1 1 d R H9C H 0.2419 0.7271 0.3559 0.080 Uiso 1 1 d R C11 C 0.2821(3) 0.79922(14) 0.09798(18) 0.0325(6) Uani 1 1 d . C12 C 0.3429(3) 0.86699(15) 0.1451(2) 0.0436(7) Uani 1 1 d . H12A H 0.3633 0.8686 0.2140 0.052 Uiso 1 1 calc R C13 C 0.3739(4) 0.93153(19) 0.0936(2) 0.0642(9) Uani 1 1 d . H13A H 0.4147 0.9777 0.1267 0.077 Uiso 1 1 calc R C14 C 0.3456(4) 0.9292(2) -0.0069(3) 0.0755(11) Uani 1 1 d . H14A H 0.3669 0.9738 -0.0430 0.091 Uiso 1 1 calc R C15 C 0.2865(4) 0.86217(18) -0.0541(2) 0.0617(9) Uani 1 1 d . H15A H 0.2689 0.8610 -0.1230 0.074 Uiso 1 1 calc R C16 C 0.2514(3) 0.79539(15) -0.00334(18) 0.0369(6) Uani 1 1 d . C17 C 0.1751(3) 0.72683(14) -0.05542(17) 0.0337(6) Uani 1 1 d . C18 C 0.1518(4) 0.72676(17) -0.16391(19) 0.0524(8) Uani 1 1 d . H18A H 0.1442 0.6735 -0.1869 0.079 Uiso 1 1 d R H18B H 0.2373 0.7521 -0.1846 0.079 Uiso 1 1 d R H18C H 0.0589 0.7544 -0.1899 0.079 Uiso 1 1 d R C19 C 0.0396(3) 0.60596(15) -0.06113(18) 0.0434(7) Uani 1 1 d . H19A H -0.0455 0.6270 -0.1061 0.065 Uiso 1 1 d R H19B H 0.0021 0.5710 -0.0169 0.065 Uiso 1 1 d R H19C H 0.1062 0.5777 -0.0960 0.065 Uiso 1 1 d R C31 C -0.0478(3) 0.65379(14) 0.13524(16) 0.0314(6) Uani 1 1 d . C32 C -0.1403(3) 0.71501(14) 0.09016(18) 0.0370(6) Uani 1 1 d . H32A H -0.0940 0.7570 0.0613 0.044 Uiso 1 1 calc R C33 C -0.2971(3) 0.71558(16) 0.08672(19) 0.0428(7) Uani 1 1 d . H33A H -0.3568 0.7584 0.0573 0.051 Uiso 1 1 calc R C34 C -0.3671(3) 0.65450(17) 0.1257(2) 0.0471(7) Uani 1 1 d . H34A H -0.4752 0.6547 0.1223 0.056 Uiso 1 1 calc R C35 C -0.2803(3) 0.59290(16) 0.16960(19) 0.0444(7) Uani 1 1 d . H35A H -0.3286 0.5501 0.1957 0.053 Uiso 1 1 calc R C36 C -0.1220(3) 0.59347(14) 0.17568(17) 0.0368(6) Uani 1 1 d . H36A H -0.0629 0.5517 0.2083 0.044 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 Si1 0.0340(4) 0.0322(4) 0.0311(4) -0.0008(3) 0.0033(3) 0.0024(3) N1 0.0449(13) 0.0419(12) 0.0252(12) -0.0041(9) 0.0033(10) 0.0086(11) N2 0.0341(12) 0.0342(11) 0.0234(11) -0.0007(9) 0.0025(9) -0.0006(9) O1 0.0438(11) 0.0382(9) 0.0268(9) -0.0007(8) 0.0015(8) 0.0102(8) O2 0.0470(11) 0.0378(10) 0.0294(10) 0.0003(8) -0.0015(8) -0.0043(8) C1 0.0314(14) 0.0279(13) 0.0367(15) 0.0038(11) 0.0022(11) -0.0015(11) C2 0.0419(16) 0.0362(14) 0.0387(15) -0.0046(12) 0.0037(12) 0.0021(13) C3 0.0532(18) 0.0373(15) 0.056(2) -0.0017(14) 0.0108(15) 0.0067(14) C4 0.0571(19) 0.0386(16) 0.061(2) 0.0134(15) 0.0112(15) 0.0128(14) C5 0.0446(16) 0.0441(15) 0.0407(16) 0.0126(13) 0.0052(13) 0.0018(14) C6 0.0324(14) 0.0318(13) 0.0345(15) 0.0053(11) 0.0055(11) -0.0045(12) C7 0.0418(15) 0.0339(14) 0.0301(14) 0.0061(11) 0.0028(12) -0.0038(12) C8 0.100(3) 0.0602(19) 0.0387(19) -0.0053(15) -0.0192(18) 0.0275(19) C9 0.064(2) 0.0625(18) 0.0315(16) -0.0065(13) 0.0019(14) 0.0186(16) C11 0.0227(13) 0.0384(14) 0.0367(15) 0.0012(12) 0.0060(11) -0.0006(11) C12 0.0391(15) 0.0470(16) 0.0427(16) -0.0052(13) 0.0020(13) -0.0084(13) C13 0.070(2) 0.0582(19) 0.065(2) -0.0081(17) 0.0124(18) -0.0309(18) C14 0.093(3) 0.067(2) 0.068(2) 0.0076(18) 0.020(2) -0.046(2) C15 0.074(2) 0.069(2) 0.0434(18) 0.0054(16) 0.0154(16) -0.0293(18) C16 0.0298(14) 0.0451(15) 0.0368(15) 0.0016(12) 0.0087(11) -0.0057(12) C17 0.0322(14) 0.0415(15) 0.0276(14) 0.0010(11) 0.0057(11) 0.0019(12) C18 0.064(2) 0.0636(19) 0.0307(16) 0.0029(13) 0.0120(14) -0.0133(16) C19 0.0566(18) 0.0412(15) 0.0299(15) -0.0041(12) 0.0008(13) -0.0117(14) C31 0.0368(14) 0.0354(13) 0.0215(12) -0.0017(11) 0.0038(10) 0.0031(12) C32 0.0433(16) 0.0374(14) 0.0311(14) 0.0043(11) 0.0089(12) 0.0021(13) C33 0.0405(16) 0.0490(16) 0.0384(16) -0.0001(13) 0.0060(12) 0.0104(14) C34 0.0357(15) 0.0600(18) 0.0484(17) -0.0132(15) 0.0152(13) -0.0032(15) C35 0.0454(18) 0.0472(16) 0.0446(17) -0.0039(13) 0.0189(13) -0.0096(14) C36 0.0487(17) 0.0332(13) 0.0293(14) 0.0017(11) 0.0095(12) 0.0015(13) 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' Si Si 0.0817 0.0704 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle O1 Si1 O2 120.51(10) O1 Si1 N1 95.88(9) O2 Si1 N1 92.40(9) O1 Si1 C31 120.10(10) O2 Si1 C31 117.11(10) N1 Si1 C31 96.78(10) O1 Si1 N2 79.71(8) O2 Si1 N2 87.99(8) N1 Si1 N2 175.07(10) C31 Si1 N2 87.40(9) C7 N1 C9 114.1(2) C7 N1 Si1 127.61(17) C9 N1 Si1 114.66(16) C17 N2 C19 118.0(2) C17 N2 Si1 129.06(16) C19 N2 Si1 112.77(15) C1 O1 Si1 130.94(16) C11 O2 Si1 137.69(16) O1 C1 C2 115.5(2) O1 C1 C6 122.6(2) C2 C1 C6 121.9(2) C3 C2 C1 120.0(3) C3 C2 H2A 120.0 C1 C2 H2A 120.0 C2 C3 C4 119.9(3) C2 C3 H3A 120.1 C4 C3 H3A 120.0 C5 C4 C3 119.7(3) C5 C4 H4A 120.1 C3 C4 H4A 120.1 C4 C5 C6 122.2(3) C4 C5 H5A 118.9 C6 C5 H5A 118.9 C1 C6 C5 116.3(2) C1 C6 C7 121.7(2) C5 C6 C7 121.9(2) C8 C7 N1 123.2(2) C8 C7 C6 120.5(2) N1 C7 C6 116.3(2) C7 C8 H8A 119.6 C7 C8 H8B 114.4 H8A C8 H8B 126.0 N1 C9 H9A 109.2 N1 C9 H9B 109.6 H9A C9 H9B 109.5 N1 C9 H9C 109.6 H9A C9 H9C 109.5 H9B C9 H9C 109.5 O2 C11 C12 116.4(2) O2 C11 C16 123.0(2) C12 C11 C16 120.6(2) C13 C12 C11 120.9(3) C13 C12 H12A 119.6 C11 C12 H12A 119.6 C12 C13 C14 119.7(3) C12 C13 H13A 120.1 C14 C13 H13A 120.1 C15 C14 C13 119.8(3) C15 C14 H14A 120.1 C13 C14 H14A 120.1 C14 C15 C16 121.8(3) C14 C15 H15A 119.1 C16 C15 H15A 119.1 C11 C16 C15 117.1(2) C11 C16 C17 121.8(2) C15 C16 C17 120.9(2) N2 C17 C16 119.3(2) N2 C17 C18 122.6(2) C16 C17 C18 118.1(2) C17 C18 H18A 109.2 C17 C18 H18B 109.5 H18A C18 H18B 109.5 C17 C18 H18C 109.7 H18A C18 H18C 109.5 H18B C18 H18C 109.5 N2 C19 H19A 109.5 N2 C19 H19B 109.7 H19A C19 H19B 109.5 N2 C19 H19C 109.2 H19A C19 H19C 109.5 H19B C19 H19C 109.5 C36 C31 C32 116.7(2) C36 C31 Si1 120.91(18) C32 C31 Si1 122.35(19) C33 C32 C31 121.5(2) C33 C32 H32A 119.2 C31 C32 H32A 119.2 C34 C33 C32 120.3(3) C34 C33 H33A 119.9 C32 C33 H33A 119.9 C33 C34 C35 119.9(3) C33 C34 H34A 120.0 C35 C34 H34A 120.0 C34 C35 C36 119.8(3) C34 C35 H35A 120.1 C36 C35 H35A 120.1 C35 C36 C31 121.7(2) C35 C36 H36A 119.2 C31 C36 H36A 119.2 loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance Si1 O1 1.6555(17) Si1 O2 1.6636(18) Si1 N1 1.804(2) Si1 C31 1.878(3) Si1 N2 2.081(2) N1 C7 1.378(3) N1 C9 1.462(3) N2 C17 1.293(3) N2 C19 1.476(3) O1 C1 1.370(3) O2 C11 1.350(3) C1 C2 1.391(3) C1 C6 1.393(3) C2 C3 1.371(4) C2 H2A 0.9500 C3 C4 1.383(4) C3 H3A 0.9500 C4 C5 1.379(4) C4 H4A 0.9500 C5 C6 1.401(3) C5 H5A 0.9500 C6 C7 1.486(3) C7 C8 1.348(4) C8 H8A 0.9713 C8 H8B 1.0430 C9 H9A 0.9600 C9 H9B 0.9600 C9 H9C 0.9600 C11 C12 1.388(3) C11 C16 1.398(3) C12 C13 1.369(4) C12 H12A 0.9500 C13 C14 1.385(5) C13 H13A 0.9500 C14 C15 1.374(4) C14 H14A 0.9500 C15 C16 1.404(4) C15 H15A 0.9500 C16 C17 1.474(3) C17 C18 1.496(3) C18 H18A 0.9599 C18 H18B 0.9599 C18 H18C 0.9600 C19 H19A 0.9600 C19 H19B 0.9599 C19 H19C 0.9600 C31 C36 1.393(3) C31 C32 1.403(3) C32 C33 1.380(4) C32 H32A 0.9500 C33 C34 1.372(4) C33 H33A 0.9500 C34 C35 1.377(4) C34 H34A 0.9500 C35 C36 1.388(4) C35 H35A 0.9500 C36 H36A 0.9500 loop_ _geom_torsion_atom_site_label_1 _geom_torsion_atom_site_label_2 _geom_torsion_atom_site_label_3 _geom_torsion_atom_site_label_4 _geom_torsion O1 Si1 N1 C7 22.4(2) O2 Si1 N1 C7 -98.6(2) C31 Si1 N1 C7 143.7(2) O1 Si1 N1 C9 179.3(2) O2 Si1 N1 C9 58.3(2) C31 Si1 N1 C9 -59.3(2) O1 Si1 N2 C17 -115.9(2) O2 Si1 N2 C17 5.6(2) C31 Si1 N2 C17 122.9(2) O1 Si1 N2 C19 58.85(17) O2 Si1 N2 C19 -179.64(18) C31 Si1 N2 C19 -62.38(18) O2 Si1 O1 C1 92.1(2) N1 Si1 O1 C1 -4.2(2) C31 Si1 O1 C1 -105.5(2) N2 Si1 O1 C1 173.6(2) O1 Si1 O2 C11 82.7(3) N1 Si1 O2 C11 -179.0(2) C31 Si1 O2 C11 -80.1(3) N2 Si1 O2 C11 5.9(2) Si1 O1 C1 C2 175.95(18) Si1 O1 C1 C6 -6.7(3) O1 C1 C2 C3 177.0(2) C6 C1 C2 C3 -0.4(4) C1 C2 C3 C4 0.2(4) C2 C3 C4 C5 0.5(4) C3 C4 C5 C6 -1.1(4) O1 C1 C6 C5 -177.3(2) C2 C1 C6 C5 -0.1(4) O1 C1 C6 C7 3.5(4) C2 C1 C6 C7 -179.3(2) C4 C5 C6 C1 0.8(4) C4 C5 C6 C7 -180.0(3) C9 N1 C7 C8 -3.9(4) Si1 N1 C7 C8 153.2(3) C9 N1 C7 C6 174.9(2) Si1 N1 C7 C6 -28.1(3) C1 C6 C7 C8 -168.0(3) C5 C6 C7 C8 12.8(4) C1 C6 C7 N1 13.2(3) C5 C6 C7 N1 -166.0(2) Si1 O2 C11 C12 168.6(2) Si1 O2 C11 C16 -11.8(4) O2 C11 C12 C13 179.7(3) C16 C11 C12 C13 0.1(4) C11 C12 C13 C14 -0.5(5) C12 C13 C14 C15 0.0(6) C13 C14 C15 C16 0.9(6) O2 C11 C16 C15 -178.8(3) C12 C11 C16 C15 0.7(4) O2 C11 C16 C17 5.7(4) C12 C11 C16 C17 -174.8(2) C14 C15 C16 C11 -1.3(5) C14 C15 C16 C17 174.4(3) C19 N2 C17 C16 175.3(2) Si1 N2 C17 C16 -10.2(3) C19 N2 C17 C18 -2.0(4) Si1 N2 C17 C18 172.46(19) C11 C16 C17 N2 4.5(4) C15 C16 C17 N2 -170.9(3) C11 C16 C17 C18 -178.0(2) C15 C16 C17 C18 6.6(4) O1 Si1 C31 C36 52.1(2) O2 Si1 C31 C36 -144.95(18) N1 Si1 C31 C36 -48.7(2) N2 Si1 C31 C36 128.64(19) O1 Si1 C31 C32 -128.57(19) O2 Si1 C31 C32 34.4(2) N1 Si1 C31 C32 130.58(19) N2 Si1 C31 C32 -52.0(2) C36 C31 C32 C33 0.4(3) Si1 C31 C32 C33 -178.93(19) C31 C32 C33 C34 -1.7(4) C32 C33 C34 C35 0.9(4) C33 C34 C35 C36 1.0(4) C34 C35 C36 C31 -2.3(4) C32 C31 C36 C35 1.6(3) Si1 C31 C36 C35 -179.07(19)