Bis(perchlorocatecholato)silane and heteroleptic bidonors: hidden frustrated Lewis pairs resulting from ring strain.
Hartmann, Deborah; Braner, Sven; Greb, Lutz; Chemical communications (Cambridge, England) 57 (2021) 8572–8575; doi:10.1039/d1cc03452a

data_7128770
_publ_section_title
;
 Bis(perchlorocatecholato)silane and heteroleptic bidonors: hidden
 frustrated Lewis pairs resulting from ring strain.
;
_journal_issue                   69
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              8572
_journal_page_last               8575
_journal_paper_doi               10.1039/d1cc03452a
_journal_volume                  57
_journal_year                    2021
_chemical_formula_moiety         'C20 H12 Cl8 N2 O4 Si, 2(C H2 Cl2)'
_chemical_formula_sum            'C22 H16 Cl12 N2 O4 Si'
_chemical_formula_weight         825.86
_chemical_properties_physical    Moisture-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2021-03-31
_audit_creation_method
;
Olex2 1.3-alpha
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6272)
;
_audit_update_record
;
2021-06-20 deposited with the CCDC.	2021-07-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 112.19(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.942(3)
_cell_length_b                   12.536(3)
_cell_length_c                   15.917(3)
_cell_measurement_reflns_used    1580
_cell_measurement_temperature    100
_cell_measurement_theta_max      66.0
_cell_measurement_theta_min      1
_cell_volume                     3130.2(13)
_computing_molecular_graphics    'Olex2 1.3-alpha (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3-alpha (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100
_diffrn_detector_type            'CCD detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'NONIUS KAPPA CCD'
_diffrn_measurement_method       '\w scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0812
_diffrn_reflns_av_unetI/netI     0.1038
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13294
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.100
_diffrn_reflns_theta_min         2.080
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.135
_exptl_absorpt_correction_T_min  1
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.752
_exptl_crystal_description       block
_exptl_crystal_F_000             1648
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.825
_refine_diff_density_min         -0.994
_refine_diff_density_rms         0.106
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     372
_refine_ls_number_reflns         6902
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.1155
_refine_ls_R_factor_gt           0.0560
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0516P)^2^+1.0720P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1111
_refine_ls_wR_factor_ref         0.1300
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4188
_reflns_number_total             6902
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc03452a2.cif
_cod_data_source_block           dh177b_p21c
_cod_depositor_comments
'Adding full bibliography for 7128765--7128778.cif.'
_cod_database_code               7128770
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.805
_shelx_estimated_absorpt_t_min   0.601
_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 Secondary CH2 refined with riding coordinates:
 C18(H18A,H18B), C22(H22A,H22B), C21(H21A,H21B)
2.b Aromatic/amide H refined with riding coordinates:
 C17(H17), C16(H16), C14(H14), C15(H15)
2.c Idealised Me refined as rotating group:
 C19(H19A,H19B,H19C), C20(H20A,H20B,H20C)
;
_shelx_res_checksum              79704
_olex2_date_sample_data_collection 2019-05-27
_olex2_submission_special_instructions 'No special instructions were received'