An Early‒Late Transition Metal Hybrid Analogue of Hexaborane(12)
Anju, R. S.; Roy, Dipak Kumar; Mondal, Bijan; Ramkumar, V.; Ghosh, Sundargopal; Organometallics 32 (2013) 4618–; doi:10.1021/om400594d

data_4081328
_publ_section_title
;
 An Early--Late Transition Metal Hybrid Analogue of Hexaborane(12)
;
_journal_issue                   16
_journal_name_full               Organometallics
_journal_page_first              4618
_journal_paper_doi               10.1021/om400594d
_journal_volume                  32
_journal_year                    2013
_chemical_formula_sum            'C20 H35 B4 Ir Zr'
_chemical_formula_weight         602.14
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                   20.1307(8)
_cell_length_b                   13.6814(5)
_cell_length_c                   8.1695(3)
_cell_measurement_reflns_used    5424
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      29.5
_cell_measurement_theta_min      2.5
_cell_volume                     2250.01(15)
_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-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR92 (Altornare et al., 1993)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker axs kappa apex2 CCD Diffractometer'
_diffrn_measurement_method       '\w and \f scan'
_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  0.0224
_diffrn_reflns_av_sigmaI/netI    0.0233
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            8072
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.02
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    6.373
_exptl_absorpt_correction_T_max  0.491
_exptl_absorpt_correction_T_min  0.363
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 1999)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.778
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1168
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.064
_refine_diff_density_min         -0.558
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     198
_refine_ls_number_reflns         2280
_refine_ls_number_restraints     218
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0255
_refine_ls_R_factor_gt           0.0195
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0177P)^2^+3.4492P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0431
_refine_ls_wR_factor_ref         0.0463
_reflns_number_gt                2022
_reflns_number_total             2280
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om400594d_si_002.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      Pnma
_cod_database_code               4081328