Weakly Coordinating Nature of a Carborane Cage Bearing Different Halogen Atoms. Synthesis and Structural Characterization of Icosahedral Mixed Halocarborane Anions, 1-H-CB11Y5X6- (X, Y = Cl, Br, I)
Chi-Wing Tsang; Qingchuan Yang; Eric Tung-Po Sze; Thomas C. W. Mak; Dominic T. W. Chan; Zuowei Xie; Inorganic Chemistry 39 (2000) 5851–5858; doi:10.1021/ic000354r

data_4321641
_publ_section_title
;
 Weakly Coordinating Nature of a Carborane Cage Bearing Different Halogen
 Atoms. Synthesis and Structural Characterization of Icosahedral Mixed
 Halocarborane Anions, 1-H-CB11Y5X6- (X, Y = Cl, Br, I)
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5851
_journal_page_last               5858
_journal_paper_doi               10.1021/ic000354r
_journal_volume                  39
_journal_year                    2000
_chemical_formula_sum            'C2 H3 Ag B11 Cl11'
_chemical_formula_weight         643.77
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           205
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-P 2ac 2ab 3'
_symmetry_space_group_name_H-M   'P a -3'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.4887(14)
_cell_length_b                   12.4887(14)
_cell_length_c                   12.4887(14)
_cell_measurement_temperature    296(2)
_cell_volume                     1947.8(4)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.953
_diffrn_measured_fraction_theta_max 0.953
_diffrn_measurement_method       '\w scans'
_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  0.0594
_diffrn_reflns_av_sigmaI/netI    0.0203
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            6116
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.0
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    2.529
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9079
_exptl_absorpt_correction_type   abscor
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.195
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.956
_refine_diff_density_min         -0.915
_refine_diff_density_rms         0.112
_refine_ls_extinction_coef       0.0005(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     41
_refine_ls_number_reflns         546
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.095
_refine_ls_R_factor_all          0.0776
_refine_ls_R_factor_gt           0.0638
_refine_ls_shift/su_max          0.046
_refine_ls_shift/su_mean         0.010
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0980P)^2^+6.8649P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1699
_refine_ls_wR_factor_ref         0.1824
_reflns_number_gt                428
_reflns_number_total             546
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic000354r_5.cif
_cod_data_source_block           Ag[1-CH3-CB11Cl11]
_cod_database_code               4321641