Crystal and molecular structures of the nido-carborane anions, 7,9- and 2,9-C2B9H12−
Fox, Mark A.; Goeta, Andrés E.; Hughes, Andrew K.; Johnson, Andrew L.; Journal of the Chemical Society, Dalton Transactions  (2002) 2132–; doi:10.1039/b108937d

data_7011193
_publ_section_title
;
 Crystal and molecular structures of the nido-carborane anions, 7,9-
 and 2,9-C2B9H12&#x2212;
;
_journal_issue                   10
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              2132
_journal_paper_doi               10.1039/b108937d
_journal_year                    2002
_chemical_formula_sum            'C16 H31 B9 N2'
_chemical_formula_weight         348.72
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                68.443(3)
_cell_angle_beta                 84.683(3)
_cell_angle_gamma                76.976(3)
_cell_formula_units_Z            2
_cell_length_a                   8.456(1)
_cell_length_b                   10.317(1)
_cell_length_c                   12.945(1)
_cell_measurement_reflns_used    669
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.35
_cell_measurement_theta_min      13.66
_cell_volume                     1023.26(18)
_computing_cell_refinement       'SMART-NT V5.0 (Bruker, 1998a)'
_computing_data_collection       'SMART-NT V5.0 (Bruker, 1998a)'
_computing_data_reduction        'SAINT-NT V5.0 (Bruker, 1998b)'
_computing_molecular_graphics    'SHELXTL-NT V5.1 (Bruker, 1998c)'
_computing_publication_material  'SHELXTL-NT V5.1 (Bruker, 1998c)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART-CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0317
_diffrn_reflns_av_sigmaI/netI    0.0256
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            8405
_diffrn_reflns_theta_full        23.25
_diffrn_reflns_theta_max         23.25
_diffrn_reflns_theta_min         1.69
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.059
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.132
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       'thin plate'
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.78
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.149
_refine_diff_density_min         -0.180
_refine_diff_density_rms         0.030
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     368
_refine_ls_number_reflns         2946
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0416
_refine_ls_R_factor_gt           0.0341
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0474P)^2^+0.2666P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0874
_refine_ls_wR_factor_ref         0.0925
_reflns_number_gt                2536
_reflns_number_total             2946
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b108937d.txt
_cod_data_source_block           9
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7011193