data_1 _audit_creation_method SHELXL-97 _chemical_name_systematic ; ? ; _chemical_name_common ? _chemical_melting_point ? _chemical_formula_moiety ? _chemical_formula_sum 'C11 H17 N O Si' _chemical_formula_weight 207.35 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' _symmetry_cell_setting 'monoclinic' _symmetry_space_group_name_H-M 'Pc' loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' 'x, -y, z+1/2' _cell_length_a 10.178(4) _cell_length_b 10.104(4) _cell_length_c 12.720(5) _cell_angle_alpha 90.00 _cell_angle_beta 108.216(6) _cell_angle_gamma 90.00 _cell_volume 1242.5(8) _cell_formula_units_Z 4 _cell_measurement_temperature 293(2) _cell_measurement_reflns_used 2698 _cell_measurement_theta_min 2.92 _cell_measurement_theta_max 24.53 _exptl_crystal_description block _exptl_crystal_colour colorless _exptl_crystal_size_max 0.6 _exptl_crystal_size_mid 0.4 _exptl_crystal_size_min 0.2 _exptl_crystal_density_meas ? _exptl_crystal_density_diffrn 1.108 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 448 _exptl_absorpt_coefficient_mu 0.161 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_correction_T_min 0.926 _exptl_absorpt_correction_T_max 0.968 _exptl_absorpt_process_details ? _exptl_special_details ; ? ; _diffrn_ambient_temperature 293(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 'CCD area detector' _diffrn_measurement_method 'phi and omega scans' _diffrn_detector_area_resol_mean ? _diffrn_standards_number ? _diffrn_standards_interval_count ? _diffrn_standards_interval_time ? _diffrn_standards_decay_% ? _diffrn_reflns_number 9597 _diffrn_reflns_av_R_equivalents 0.0254 _diffrn_reflns_av_sigmaI/netI 0.0397 _diffrn_reflns_limit_h_min -11 _diffrn_reflns_limit_h_max 11 _diffrn_reflns_limit_k_min -11 _diffrn_reflns_limit_k_max 11 _diffrn_reflns_limit_l_min -13 _diffrn_reflns_limit_l_max 14 _diffrn_reflns_theta_min 2.02 _diffrn_reflns_theta_max 24.64 _reflns_number_total 3768 _reflns_number_gt 2683 _reflns_threshold_expression >2sigma(I) _computing_data_collection 'Bruker SMART' _computing_cell_refinement 'Bruker SMART' _computing_data_reduction 'Bruker SAINT' _computing_structure_solution 'Bruker SHELXTL' _computing_structure_refinement 'Bruker SHELXTL' _computing_molecular_graphics 'Bruker SHELXTL' _computing_publication_material 'Bruker SHELXTL' _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. ; _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^)+(0.1941P)^2^+1.3972P] 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 mixed _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 0.4(5) _refine_ls_number_reflns 3768 _refine_ls_number_parameters 260 _refine_ls_number_restraints 26 _refine_ls_R_factor_all 0.1578 _refine_ls_R_factor_gt 0.1330 _refine_ls_wR_factor_ref 0.3530 _refine_ls_wR_factor_gt 0.3229 _refine_ls_goodness_of_fit_ref 1.261 _refine_ls_restrained_S_all 1.273 _refine_ls_shift/su_max 0.000 _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 Si1 Si 1.2145(2) 0.99478(19) 0.7387(2) 0.0407(7) Uani 1 1 d . . . O1 O 0.8943(12) 1.1938(7) 0.7311(10) 0.098(3) Uani 1 1 d . . . N1 N 0.9338(8) 0.9834(8) 0.7243(7) 0.050(2) Uani 1 1 d . . . H1 H 0.9177 0.9058 0.7453 0.060 Uiso 1 1 calc R . . C2 C 1.3194(15) 0.9992(9) 0.6414(12) 0.071(3) Uani 1 1 d . . . H2A H 1.4160 1.0022 0.6830 0.107 Uiso 1 1 calc R . . H2B H 1.2953 1.0764 0.5953 0.107 Uiso 1 1 calc R . . H2C H 1.3008 0.9213 0.5959 0.107 Uiso 1 1 calc R . . C1 C 1.2541(12) 1.1393(12) 0.8328(10) 0.074(3) Uani 1 1 d . . . H1A H 1.2013 1.1338 0.8834 0.110 Uiso 1 1 calc R . . H1B H 1.2305 1.2192 0.7902 0.110 Uiso 1 1 calc R . . H1C H 1.3509 1.1398 0.8736 0.110 Uiso 1 1 calc R . . C3 C 1.2530(12) 0.8431(11) 0.8222(11) 0.077(4) Uani 1 1 d . . . H3A H 1.2080 0.8466 0.8782 0.115 Uiso 1 1 calc R . . H3B H 1.3511 0.8356 0.8567 0.115 Uiso 1 1 calc R . . H3C H 1.2200 0.7678 0.7754 0.115 Uiso 1 1 calc R . . C4 C 1.0254(10) 0.9940(7) 0.6545(8) 0.042(2) Uani 1 1 d . . . H4A H 1.0039 1.0748 0.6113 0.051 Uiso 1 1 calc R . . H4B H 1.0077 0.9201 0.6033 0.051 Uiso 1 1 calc R . . C5 C 0.8804(13) 1.0766(9) 0.7536(11) 0.074(4) Uani 1 1 d . . . C6 C 0.7828(13) 1.0528(10) 0.8299(9) 0.062(3) Uani 1 1 d . . . C11 C 0.7700(17) 1.1462(12) 0.8948(16) 0.102(5) Uani 1 1 d . . . H11 H 0.8136 1.2275 0.8971 0.122 Uiso 1 1 calc R . . C10 C 0.6875(16) 1.1195(15) 0.9617(14) 0.097(4) Uani 1 1 d U . . H10 H 0.6654 1.1902 1.0000 0.116 Uiso 1 1 calc R . . C9 C 0.6382(11) 1.0020(9) 0.9750(11) 0.059(3) Uani 1 1 d . . . H9 H 0.5838 0.9924 1.0212 0.071 Uiso 1 1 calc R . . C8 C 0.6659(16) 0.8985(15) 0.9231(15) 0.099(4) Uani 1 1 d U . . H8 H 0.6431 0.8128 0.9377 0.119 Uiso 1 1 calc R . . C7 C 0.7399(14) 0.9295(12) 0.8353(10) 0.077(4) Uani 1 1 d . . . H7 H 0.7535 0.8639 0.7885 0.092 Uiso 1 1 calc R . . Si2 Si 0.5630(3) 0.49691(18) 0.5759(2) 0.0416(7) Uani 1 1 d . . . O2 O 0.8824(12) 0.6923(6) 0.7276(10) 0.098(3) Uani 1 1 d . . . N2 N 0.8428(8) 0.4822(8) 0.7012(7) 0.050(2) Uani 1 1 d . . . H2 H 0.8583 0.4045 0.7300 0.060 Uiso 1 1 calc R . . C12 C 0.5267(11) 0.6406(12) 0.6517(11) 0.070(3) Uani 1 1 d . . . H12A H 0.5938 0.6444 0.7240 0.106 Uiso 1 1 calc R . . H12B H 0.4358 0.6321 0.6586 0.106 Uiso 1 1 calc R . . H12C H 0.5315 0.7203 0.6119 0.106 Uiso 1 1 calc R . . C14 C 0.5207(12) 0.3430(12) 0.6381(12) 0.080(4) Uani 1 1 d . . . H14A H 0.5833 0.3330 0.7118 0.120 Uiso 1 1 calc R . . H14B H 0.5293 0.2684 0.5940 0.120 Uiso 1 1 calc R . . H14C H 0.4276 0.3481 0.6407 0.120 Uiso 1 1 calc R . . C13 C 0.4573(14) 0.5054(9) 0.4251(10) 0.066(3) Uani 1 1 d . . . H13A H 0.3608 0.4993 0.4182 0.099 Uiso 1 1 calc R . . H13B H 0.4824 0.4334 0.3860 0.099 Uiso 1 1 calc R . . H13C H 0.4748 0.5878 0.3945 0.099 Uiso 1 1 calc R . . C15 C 0.7529(10) 0.4954(7) 0.5865(9) 0.044(2) Uani 1 1 d . . . H15A H 0.7702 0.4223 0.5432 0.053 Uiso 1 1 calc R . . H15B H 0.7753 0.5768 0.5555 0.053 Uiso 1 1 calc R . . C16 C 0.8959(13) 0.5766(9) 0.7569(13) 0.077(4) Uani 1 1 d . . . C17 C 0.9950(12) 0.5534(10) 0.8833(10) 0.062(3) Uani 1 1 d . . . C18 C 1.0090(17) 0.6446(12) 0.9567(16) 0.104(5) Uani 1 1 d . . . H18 H 0.9670 0.7265 0.9369 0.124 Uiso 1 1 calc R . . C19 C 1.0855(14) 0.6202(13) 1.0631(13) 0.089(4) Uani 1 1 d U . . H19 H 1.1011 0.6901 1.1130 0.107 Uiso 1 1 calc R . . C20 C 1.1404(11) 0.5013(9) 1.1014(10) 0.058(3) Uani 1 1 d . . . H20 H 1.1995 0.4921 1.1734 0.069 Uiso 1 1 calc R . . C21 C 1.1078(18) 0.3965(15) 1.0331(14) 0.111(5) Uani 1 1 d U . . H21 H 1.1263 0.3100 1.0585 0.133 Uiso 1 1 calc R . . C22 C 1.0377(14) 0.4290(12) 0.9102(11) 0.077(3) Uani 1 1 d . . . H22 H 1.0253 0.3642 0.8560 0.093 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 0.0441(14) 0.0382(13) 0.0396(15) -0.0009(10) 0.0130(11) -0.0004(10) O1 0.102(6) 0.051(4) 0.142(8) 0.009(5) 0.042(6) -0.003(4) N1 0.047(5) 0.060(5) 0.038(5) -0.009(3) 0.006(4) 0.015(4) C2 0.087(9) 0.076(8) 0.067(9) 0.001(5) 0.048(7) 0.001(5) C1 0.070(7) 0.072(7) 0.064(8) -0.026(6) 0.001(6) 0.012(5) C3 0.067(7) 0.066(7) 0.095(10) 0.036(6) 0.021(7) 0.001(5) C4 0.043(5) 0.047(5) 0.032(5) 0.001(3) 0.004(4) 0.000(3) C5 0.070(7) 0.038(5) 0.088(9) 0.023(6) -0.013(6) -0.008(5) C6 0.086(8) 0.044(5) 0.046(6) -0.011(4) 0.005(5) -0.017(5) C11 0.105(10) 0.053(7) 0.155(14) 0.016(8) 0.052(10) 0.018(6) C10 0.094(7) 0.094(7) 0.117(9) 0.010(6) 0.053(7) 0.018(6) C9 0.044(5) 0.070(7) 0.069(8) 0.000(5) 0.025(5) 0.002(4) C8 0.094(7) 0.083(7) 0.133(9) -0.023(6) 0.054(7) -0.024(6) C7 0.110(9) 0.055(7) 0.061(7) -0.019(5) 0.021(7) 0.018(6) Si2 0.0450(14) 0.0384(12) 0.0421(15) -0.0014(9) 0.0145(11) 0.0007(9) O2 0.106(6) 0.046(4) 0.137(8) 0.015(5) 0.032(6) 0.003(4) N2 0.047(5) 0.058(5) 0.048(5) -0.019(4) 0.021(4) -0.017(4) C12 0.056(6) 0.084(8) 0.080(8) -0.032(6) 0.034(6) 0.000(5) C14 0.070(7) 0.078(8) 0.095(10) 0.039(7) 0.030(7) -0.003(6) C13 0.079(8) 0.071(7) 0.039(7) -0.003(4) 0.005(6) 0.000(5) C15 0.047(5) 0.044(5) 0.045(6) -0.006(4) 0.019(4) 0.003(3) C16 0.073(7) 0.048(6) 0.132(12) 0.042(7) 0.065(8) 0.014(5) C17 0.092(8) 0.038(5) 0.073(8) 0.001(5) 0.049(7) 0.018(5) C18 0.107(10) 0.056(7) 0.143(15) 0.002(8) 0.031(10) -0.028(7) C19 0.090(7) 0.073(6) 0.085(8) -0.002(6) -0.001(6) -0.015(6) C20 0.044(5) 0.065(7) 0.051(7) -0.001(4) -0.003(5) 0.001(4) C21 0.121(9) 0.076(7) 0.115(9) -0.009(6) 0.007(7) 0.048(6) C22 0.099(9) 0.066(7) 0.072(9) -0.029(6) 0.034(7) -0.016(6) _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 Si1 C3 1.836(10) . ? Si1 C1 1.850(10) . ? Si1 C2 1.872(11) . ? Si1 C4 1.887(10) . ? O1 C5 1.236(11) . ? N1 C5 1.203(14) . ? N1 C4 1.480(14) . ? N1 H1 0.8600 . ? C2 H2A 0.9600 . ? C2 H2B 0.9600 . ? C2 H2C 0.9600 . ? C1 H1A 0.9600 . ? C1 H1B 0.9600 . ? C1 H1C 0.9600 . ? C3 H3A 0.9600 . ? C3 H3B 0.9600 . ? C3 H3C 0.9600 . ? C4 H4A 0.9700 . ? C4 H4B 0.9700 . ? C5 C6 1.610(18) . ? C6 C11 1.287(18) . ? C6 C7 1.329(18) . ? C11 C10 1.40(2) . ? C11 H11 0.9300 . ? C10 C9 1.321(17) . ? C10 H10 0.9300 . ? C9 C8 1.313(18) . ? C9 H9 0.9300 . ? C8 C7 1.56(2) . ? C8 H8 0.9300 . ? C7 H7 0.9300 . ? Si2 C12 1.844(10) . ? Si2 C14 1.855(10) . ? Si2 C13 1.885(12) . ? Si2 C15 1.894(10) . ? O2 C16 1.222(11) . ? N2 C16 1.210(15) . ? N2 C15 1.466(14) . ? N2 H2 0.8600 . ? C12 H12A 0.9600 . ? C12 H12B 0.9600 . ? C12 H12C 0.9600 . ? C14 H14A 0.9600 . ? C14 H14B 0.9600 . ? C14 H14C 0.9600 . ? C13 H13A 0.9600 . ? C13 H13B 0.9600 . ? C13 H13C 0.9600 . ? C15 H15A 0.9700 . ? C15 H15B 0.9700 . ? C16 C17 1.626(18) . ? C17 C18 1.287(19) . ? C17 C22 1.339(17) . ? C18 C19 1.36(2) . ? C18 H18 0.9300 . ? C19 C20 1.350(16) . ? C19 H19 0.9300 . ? C20 C21 1.344(18) . ? C20 H20 0.9300 . ? C21 C22 1.54(2) . ? C21 H21 0.9300 . ? C22 H22 0.9300 . ? 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 C3 Si1 C1 108.7(7) . . ? C3 Si1 C2 109.9(5) . . ? C1 Si1 C2 110.8(6) . . ? C3 Si1 C4 108.7(5) . . ? C1 Si1 C4 110.4(4) . . ? C2 Si1 C4 108.4(6) . . ? C5 N1 C4 124.0(10) . . ? C5 N1 H1 118.0 . . ? C4 N1 H1 118.0 . . ? Si1 C2 H2A 109.5 . . ? Si1 C2 H2B 109.5 . . ? H2A C2 H2B 109.5 . . ? Si1 C2 H2C 109.5 . . ? H2A C2 H2C 109.5 . . ? H2B C2 H2C 109.5 . . ? Si1 C1 H1A 109.5 . . ? Si1 C1 H1B 109.5 . . ? H1A C1 H1B 109.5 . . ? Si1 C1 H1C 109.5 . . ? H1A C1 H1C 109.5 . . ? H1B C1 H1C 109.5 . . ? Si1 C3 H3A 109.5 . . ? Si1 C3 H3B 109.5 . . ? H3A C3 H3B 109.5 . . ? Si1 C3 H3C 109.5 . . ? H3A C3 H3C 109.5 . . ? H3B C3 H3C 109.5 . . ? N1 C4 Si1 112.4(7) . . ? N1 C4 H4A 109.1 . . ? Si1 C4 H4A 109.1 . . ? N1 C4 H4B 109.1 . . ? Si1 C4 H4B 109.1 . . ? H4A C4 H4B 107.9 . . ? N1 C5 O1 125.7(14) . . ? N1 C5 C6 119.6(9) . . ? O1 C5 C6 114.8(11) . . ? C11 C6 C7 123.6(12) . . ? C11 C6 C5 118.8(10) . . ? C7 C6 C5 116.5(10) . . ? C6 C11 C10 116.8(13) . . ? C6 C11 H11 121.6 . . ? C10 C11 H11 121.6 . . ? C9 C10 C11 125.2(14) . . ? C9 C10 H10 117.4 . . ? C11 C10 H10 117.4 . . ? C8 C9 C10 120.1(13) . . ? C8 C9 H9 119.9 . . ? C10 C9 H9 119.9 . . ? C9 C8 C7 115.3(12) . . ? C9 C8 H8 122.3 . . ? C7 C8 H8 122.3 . . ? C6 C7 C8 117.7(10) . . ? C6 C7 H7 121.2 . . ? C8 C7 H7 121.2 . . ? C12 Si2 C14 109.0(7) . . ? C12 Si2 C13 110.6(5) . . ? C14 Si2 C13 109.7(6) . . ? C12 Si2 C15 109.6(4) . . ? C14 Si2 C15 109.3(4) . . ? C13 Si2 C15 108.6(6) . . ? C16 N2 C15 122.5(10) . . ? C16 N2 H2 118.8 . . ? C15 N2 H2 118.8 . . ? Si2 C12 H12A 109.5 . . ? Si2 C12 H12B 109.5 . . ? H12A C12 H12B 109.5 . . ? Si2 C12 H12C 109.5 . . ? H12A C12 H12C 109.5 . . ? H12B C12 H12C 109.5 . . ? Si2 C14 H14A 109.5 . . ? Si2 C14 H14B 109.5 . . ? H14A C14 H14B 109.5 . . ? Si2 C14 H14C 109.5 . . ? H14A C14 H14C 109.5 . . ? H14B C14 H14C 109.5 . . ? Si2 C13 H13A 109.5 . . ? Si2 C13 H13B 109.5 . . ? H13A C13 H13B 109.5 . . ? Si2 C13 H13C 109.5 . . ? H13A C13 H13C 109.5 . . ? H13B C13 H13C 109.5 . . ? N2 C15 Si2 112.1(7) . . ? N2 C15 H15A 109.2 . . ? Si2 C15 H15A 109.2 . . ? N2 C15 H15B 109.2 . . ? Si2 C15 H15B 109.2 . . ? H15A C15 H15B 107.9 . . ? N2 C16 O2 126.1(15) . . ? N2 C16 C17 119.4(9) . . ? O2 C16 C17 114.5(12) . . ? C18 C17 C22 122.2(12) . . ? C18 C17 C16 120.5(11) . . ? C22 C17 C16 116.1(9) . . ? C17 C18 C19 119.5(14) . . ? C17 C18 H18 120.3 . . ? C19 C18 H18 120.3 . . ? C20 C19 C18 124.4(13) . . ? C20 C19 H19 117.8 . . ? C18 C19 H19 117.8 . . ? C21 C20 C19 118.5(13) . . ? C21 C20 H20 120.7 . . ? C19 C20 H20 120.7 . . ? C20 C21 C22 115.5(12) . . ? C20 C21 H21 122.2 . . ? C22 C21 H21 122.2 . . ? C17 C22 C21 118.1(10) . . ? C17 C22 H22 121.0 . . ? C21 C22 H22 121.0 . . ? 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 _geom_torsion_site_symmetry_1 _geom_torsion_site_symmetry_2 _geom_torsion_site_symmetry_3 _geom_torsion_site_symmetry_4 _geom_torsion_publ_flag C5 N1 C4 Si1 96.4(10) . . . . ? C3 Si1 C4 N1 57.6(7) . . . . ? C1 Si1 C4 N1 -61.5(7) . . . . ? C2 Si1 C4 N1 177.0(5) . . . . ? C4 N1 C5 O1 -0.6(17) . . . . ? C4 N1 C5 C6 -179.9(8) . . . . ? N1 C5 C6 C11 153.3(12) . . . . ? O1 C5 C6 C11 -26.1(17) . . . . ? N1 C5 C6 C7 -15.4(15) . . . . ? O1 C5 C6 C7 165.3(10) . . . . ? C7 C6 C11 C10 -10(2) . . . . ? C5 C6 C11 C10 -178.2(11) . . . . ? C6 C11 C10 C9 10(2) . . . . ? C11 C10 C9 C8 0(3) . . . . ? C10 C9 C8 C7 -8(2) . . . . ? C11 C6 C7 C8 2.0(19) . . . . ? C5 C6 C7 C8 170.1(11) . . . . ? C9 C8 C7 C6 8(2) . . . . ? C16 N2 C15 Si2 -96.8(9) . . . . ? C12 Si2 C15 N2 61.9(7) . . . . ? C14 Si2 C15 N2 -57.5(8) . . . . ? C13 Si2 C15 N2 -177.2(6) . . . . ? C15 N2 C16 O2 0.7(17) . . . . ? C15 N2 C16 C17 -179.7(8) . . . . ? N2 C16 C17 C18 -152.7(12) . . . . ? O2 C16 C17 C18 27.0(16) . . . . ? N2 C16 C17 C22 15.0(14) . . . . ? O2 C16 C17 C22 -165.3(10) . . . . ? C22 C17 C18 C19 9(2) . . . . ? C16 C17 C18 C19 176.0(11) . . . . ? C17 C18 C19 C20 -6(2) . . . . ? C18 C19 C20 C21 -6(2) . . . . ? C19 C20 C21 C22 13(2) . . . . ? C18 C17 C22 C21 -1(2) . . . . ? C16 C17 C22 C21 -168.6(12) . . . . ? C20 C21 C22 C17 -10(2) . . . . ? _diffrn_measured_fraction_theta_max 0.997 _diffrn_reflns_theta_full 24.64 _diffrn_measured_fraction_theta_full 0.997 _refine_diff_density_max 1.792 _refine_diff_density_min -0.518 _refine_diff_density_rms 0.163