Organocalcium Complex-Catalyzed Selective Redistribution of ArSiH3 or Ar(alkyl)SiH2 to Ar3SiH or Ar2(alkyl)SiH
Li, Tao; McCabe, Karl N.; Maron, Laurent; Leng, Xuebing; Chen, Yaofeng; ACS Catalysis  (2021) 6348–6356; doi:10.1021/acscatal.1c00463

data_4518769
_publ_section_title
;
 Organocalcium Complex-Catalyzed Selective Redistribution of ArSiH3 or
 Ar(alkyl)SiH2 to Ar3SiH or Ar2(alkyl)SiH
;
_journal_name_full               'ACS Catalysis'
_journal_page_first              6348
_journal_page_last               6356
_journal_paper_doi               10.1021/acscatal.1c00463
_journal_year                    2021
_chemical_formula_moiety         'C28 H52 Ca N4 Si'
_chemical_formula_sum            'C28 H52 Ca N4 Si'
_chemical_formula_weight         512.90
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-06-06
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.0817(4)
_cell_length_b                   20.8984(6)
_cell_length_c                   21.3489(6)
_cell_measurement_reflns_used    9202
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      54.93
_cell_measurement_theta_min      3.27
_cell_volume                     6282.7(3)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      169.99
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0592
_diffrn_reflns_av_unetI/netI     0.0319
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            55658
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         54.968
_diffrn_reflns_theta_min         3.602
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.465
_exptl_absorpt_correction_T_max  0.7508
_exptl_absorpt_correction_T_min  0.6265
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1622 before and 0.0802 after correction. The Ratio of minimum to maximum transmission is 0.8344. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.085
_exptl_crystal_description       block
_exptl_crystal_F_000             2256
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.466
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         5961
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0551
_refine_ls_R_factor_gt           0.0427
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0478P)^2^+4.2114P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1059
_refine_ls_wR_factor_ref         0.1143
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4935
_reflns_number_total             5961
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cs1c00463_si_002.cif
_cod_data_source_block           mj19379_0m
_cod_database_code               4518769
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.867
_shelx_estimated_absorpt_t_min   0.758
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C19(H19), C22(H22)
2.b Secondary CH2 refined with riding coordinates:
 C6(H6A,H6B), C7(H7A,H7B), C9(H9A,H9B), C10(H10A,H10B), C25(H25A,H25B)
2.c Aromatic/amide H refined with riding coordinates:
 C3(H3), C15(H15), C16(H16), C17(H17)
2.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C5(H5A,H5B,H5C), C8(H8A,H8B,H8C), C11(H11A,H11B,H11C),
 C12(H12A,H12B,H12C), C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C23(H23A,H23B,
 H23C), C24(H24A,H24B,H24C), C26(H26A,H26B,H26C), C27(H27A,H27B,H27C), C28(H28A,
 H28B,H28C)
;
_shelx_res_checksum              55908
_shelx_hkl_checksum              14734
_olex2_submission_special_instructions 'No special instructions were received'