A zwitterionic disilanylium from an unsymmetrical disilene.
Bisai, Milan Kumar; Ajithkumar, V. S.; Raj, K. Vipin; Vanka, Kumar; Gonnade, Rajesh G.; Sen, Sakya S.; Chemical communications (Cambridge, England) 59 (2023) 1669–1672; doi:10.1039/d2cc06954g

data_7131179
_publ_section_title
;
 A zwitterionic disilanylium from an unsymmetrical disilene.
;
_journal_issue                   12
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1669
_journal_page_last               1672
_journal_paper_doi               10.1039/d2cc06954g
_journal_volume                  59
_journal_year                    2023
_chemical_formula_moiety         'C25 H52 N2 Si5'
_chemical_formula_sum            'C25 H52 N2 Si5'
_chemical_formula_weight         521.13
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2022-10-20 deposited with the CCDC.	2023-01-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 103.9940(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.9412(7)
_cell_length_b                   10.1371(4)
_cell_length_c                   18.4496(8)
_cell_measurement_reflns_used    9577
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      37.42
_cell_measurement_theta_min      2.31
_cell_volume                     3255.9(2)
_computing_cell_refinement       'SAINT (Bruker, 2016)'
_computing_data_collection       'APEX3 (Bruker, 2016)'
_computing_data_reduction        'SAINT (Bruker, 2016)'
_computing_molecular_graphics    'Bruker SHELXTL, Mercury 2020.20'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Photon II CPAD Area Detector'
_diffrn_detector_area_resol_mean 7.39
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker D8 VENTURE Kappa Duo PHOTON II CPAD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multilayer mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0721
_diffrn_reflns_av_unetI/netI     0.0211
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            203335
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.998
_diffrn_reflns_theta_min         2.340
_diffrn_source                   'micro-focus sealed tube'
_diffrn_source_type              'Incoatech I\mS HB'
_exptl_absorpt_coefficient_mu    0.235
_exptl_absorpt_correction_T_max  0.7475
_exptl_absorpt_correction_T_min  0.6744
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.063
_exptl_crystal_description       block
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.210
_exptl_crystal_size_mid          0.140
_exptl_crystal_size_min          0.090
_refine_diff_density_max         0.868
_refine_diff_density_min         -0.479
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     304
_refine_ls_number_reflns         7850
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0388
_refine_ls_R_factor_gt           0.0349
_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^)+(0.0558P)^2^+2.0362P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0997
_refine_ls_wR_factor_ref         0.1028
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7074
_reflns_number_total             7850
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2cc06954g2.cif
_cod_data_source_block           mo_SI_TMSCH2Cl_0m_a
_cod_depositor_comments
'Adding full bibliography for 7131179--7131182.cif.'
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7131179
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.952
_shelx_estimated_absorpt_t_max   0.979
_shelx_res_checksum              26043
_shelx_hkl_checksum              95744