A Stable Silaborene: Synthesis and Characterization
Norio Nakata; Akira Sekiguchi; Journal of the American Chemical Society 128 (2006) 422–423; doi:10.1021/ja0570741

data_4110371
_publ_section_title
;
 A Stable Silaborene: Synthesis and Characterization
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              422
_journal_page_last               423
_journal_paper_doi               10.1021/ja0570741
_journal_volume                  128
_journal_year                    2006
_chemical_formula_sum            'C27 H60 B N Si3'
_chemical_formula_weight         493.84
_chemical_name_systematic
; 
 silaborene 
;
_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                 106.461(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2370(4)
_cell_length_b                   17.8420(8)
_cell_length_c                   15.5790(7)
_cell_measurement_reflns_used    7811
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.99
_cell_measurement_theta_min      2.08
_cell_volume                     3262.0(2)
_computing_cell_refinement       'HKL scalepack'
_computing_data_collection       'MacScience Xpress'
_computing_data_reduction        Denzo
_computing_molecular_graphics    ORTEP
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR92
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'MacScience DIP2030 Image plate'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0303
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            7811
_diffrn_reflns_theta_full        27.99
_diffrn_reflns_theta_max         27.99
_diffrn_reflns_theta_min         2.08
_exptl_absorpt_coefficient_mu    0.160
_exptl_absorpt_correction_T_max  0.9536
_exptl_absorpt_correction_T_min  0.9536
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.006
_exptl_crystal_description       prism
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.541
_refine_diff_density_min         -0.449
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     391
_refine_ls_number_reflns         7811
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0596
_refine_ls_R_factor_gt           0.0494
_refine_ls_shift/su_max          0.029
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0974P)^2^+0.2712P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1393
_refine_ls_wR_factor_ref         0.1464
_reflns_number_gt                6387
_reflns_number_total             7811
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0570741si20051018_015403.cif
_cod_data_source_block           silaborene
_cod_original_sg_symbol_H-M      'P 21/n '
_cod_database_code               4110371