The First Isolation of 1,3-Diaza-2-sila-4-cyclopentene Radical Cation Salt: The X-ray Structure and Electronic Properties
Shintaro Ishida; Tohru Nishinaga; Koichi Komatsu; Chemistry Letters 34 (2005) 486–; doi:10.1246/cl.2005.486

data_8000028
_publ_section_title
;
 The First Isolation of 1,3-Diaza-2-sila-4-cyclopentene Radical Cation
 Salt: The X-ray Structure and Electronic Properties
;
_journal_issue                   4
_journal_name_full               'Chemistry Letters'
_journal_page_first              486
_journal_paper_doi               10.1246/cl.2005.486
_journal_volume                  34
_journal_year                    2005
_chemical_formula_sum            'C42 H41 B Cl3 F20 N2 Si3'
_chemical_formula_weight         1155.20
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.831(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.939(3)
_cell_length_b                   17.258(3)
_cell_length_c                   17.5640(18)
_cell_measurement_temperature    100(2)
_cell_volume                     5006.3(13)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'SHELXS-97 (Sheldrick, 1990)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0276
_diffrn_reflns_av_sigmaI/netI    0.0352
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            25763
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    0.363
_exptl_absorpt_correction_T_max  0.9646
_exptl_absorpt_correction_T_min  0.8988
_exptl_absorpt_correction_type   empirical(SADABS)
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.533
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2340
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.539
_refine_diff_density_min         -0.445
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     786
_refine_ls_number_reflns         8795
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0609
_refine_ls_R_factor_gt           0.0450
_refine_ls_shift/su_max          0.043
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0667P)^2^+0.5798P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1132
_refine_ls_wR_factor_ref         0.1205
_reflns_number_gt                6638
_reflns_number_total             8795
_reflns_threshold_expression     >2sigma(I)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               8000028