Hypoelectronic 8-11-Vertex Irida- and Rhodaboranes.
Roy, Dipak Kumar; Borthakur, Rosmita; Prakash, Rini; Bhattacharya, Somnath; Jagan, Rajamony; Ghosh, Sundargopal; Inorganic chemistry 55 (2016) 4764–4770; doi:10.1021/acs.inorgchem.6b00076

data_4347359
_publ_section_title
;
 Hypoelectronic 8-11-Vertex Irida- and Rhodaboranes.
;
_journal_issue                   10
_journal_name_full               'Inorganic chemistry'
_journal_page_first              4764
_journal_page_last               4770
_journal_paper_doi               10.1021/acs.inorgchem.6b00076
_journal_volume                  55
_journal_year                    2016
_chemical_formula_sum            'C20 H37 B7 Ir2'
_chemical_formula_weight         737.56
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                99.3790(10)
_cell_angle_beta                 101.7600(10)
_cell_angle_gamma                102.7410(10)
_cell_formula_units_Z            2
_cell_length_a                   9.1768(2)
_cell_length_b                   9.2116(2)
_cell_length_c                   16.3496(4)
_cell_measurement_reflns_used    6578
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.6
_cell_measurement_theta_min      2.6
_cell_volume                     1288.09(5)
_computing_cell_refinement       'APEX2/SAINT (Bruker, 2004)'
_computing_data_collection       'APEX2 (Bruker, 2004)'
_computing_data_reduction        'SAINT/XPREP (Bruker, 2004)'
_computing_molecular_graphics
'ORTEP3 (Farrugia, 1997) and Mercury (Bruno et al., 2002)'
_computing_publication_material  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SIR92 (Altornare et al., 1993)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker axs kappa apex2 CCD Diffrctometer'
_diffrn_measurement_method       '\w and \f scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0388
_diffrn_reflns_av_unetI/netI     0.0393
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            17477
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.000
_diffrn_reflns_theta_min         1.303
_diffrn_source                   'Sealed tube'
_exptl_absorpt_coefficient_mu    10.325
_exptl_absorpt_correction_T_max  0.492
_exptl_absorpt_correction_T_min  0.389
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 1999)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.902
_exptl_crystal_description       block
_exptl_crystal_F_000             692
_exptl_crystal_size_max          0.150
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         1.771
_refine_diff_density_min         -0.806
_refine_diff_density_rms         0.145
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         4514
_refine_ls_number_restraints     491
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0427
_refine_ls_R_factor_gt           0.0330
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0471P)^2^+3.2428P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0860
_refine_ls_wR_factor_ref         0.0952
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3757
_reflns_number_total             4514
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ic6b00076_si_002.cif
_cod_data_source_block           3
_cod_database_code               4347359
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.307
_shelx_estimated_absorpt_t_max   0.425
_shelx_res_checksum              97401
_shelx_hkl_checksum              76422