Bis(catecholato)silanes: assessment, rationale and increase of silicon’s Lewis superacidity
Hartmann, Deborah; Schädler, Marcel; Greb, Lutz; Chemical Science  (2019) –; doi:10.1039/C9SC02167A

data_1551465
_publ_section_title
;
 Bis(catecholato)silanes: assessment, rationale and increase of
 silicon&#x2019;s Lewis superacidity
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C9SC02167A
_journal_year                    2019
_chemical_formula_moiety         'C12 H8 Cl O4 Si, C36 H30 N P2'
_chemical_formula_sum            'C48 H38 Cl N O4 P2 Si'
_chemical_formula_weight         818.27
_space_group_crystal_system      tetragonal
_space_group_IT_number           78
_space_group_name_Hall           'P 4cw'
_space_group_name_H-M_alt        'P 43'
_symmetry_space_group_name_Hall  'P 4cw'
_symmetry_space_group_name_H-M   'P 43'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-01-23
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-03-26 deposited with the CCDC.    2019-06-17 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.4250(15)
_cell_length_b                   10.4250(15)
_cell_length_c                   37.648(8)
_cell_measurement_reflns_used    1996
_cell_measurement_temperature    120
_cell_measurement_theta_max      40
_cell_measurement_theta_min      1.5
_cell_volume                     4091.6(12)
_computing_cell_refinement       'DENZO/SCALEPACK (Bruker AXS, 1997-2009)'
_computing_data_collection       'COLLECT (Bruker AXS, 1997-2009)'
_computing_data_reduction        'DENZO/SCALEPACK (Bruker AXS, 1997-2009)'
_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      120
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'NONIUS Kappa CCD'
_diffrn_measurement_method       O-Scan
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1705
_diffrn_reflns_av_unetI/netI     0.1822
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       52
_diffrn_reflns_limit_l_min       -52
_diffrn_reflns_number            84460
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.984
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.047
_diffrn_reflns_theta_min         2.027
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.248
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.700278
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_description       plate
_exptl_crystal_F_000             1704
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.306
_refine_diff_density_min         -0.360
_refine_diff_density_rms         0.067
_refine_ls_abs_structure_details
;
 Flack x determined using 2041 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.09(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.989
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     514
_refine_ls_number_reflns         11798
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.989
_refine_ls_R_factor_all          0.1843
_refine_ls_R_factor_gt           0.0593
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0485P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0957
_refine_ls_wR_factor_ref         0.1262
_reflns_Friedel_coverage         0.949
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.972
_reflns_number_gt                5753
_reflns_number_total             11798
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9sc02167a2.cif
_cod_data_source_block           ms46p41
_cod_original_cell_volume        4091.6(14)
_cod_database_code               1551465
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.952
_shelx_estimated_absorpt_t_min   0.886
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C9(H9), C10(H10), C11(H11), C12(H12),
 C14(H14), C15(H15), C16(H16), C17(H17), C18(H18), C20(H20), C21(H21), C22(H22),
  C23(H23), C24(H24), C26(H26), C27(H27), C28(H28), C29(H29), C30(H30),
 C32(H32), C33(H33), C34(H34), C35(H35), C36(H36), C38(H38), C39(H39), C40(H40),
  C41(H41), C42(H42), C44(H44), C45(H45), C46(H46), C47(H47), C48(H48)
;
_shelx_res_checksum              3936
_olex2_submission_special_instructions 'No special instructions were received'