Hypoelectronic Dimetallaheteroboranes of Group 6 Transition Metals Containing Heavier Chalcogen Elements
Kiran Kumarvarma Chakrahari; Arunabha Thakur; Bijan Mondal; V. Ramkumar; Sundargopal Ghosh; Inorganic Chemistry 52 (2013) 7923–7932; doi:10.1021/ic400432v

data_4335446
_publ_section_title
;
 Hypoelectronic Dimetallaheteroboranes of Group 6 Transition Metals
 Containing Heavier Chalcogen Elements
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              7923
_journal_page_last               7932
_journal_paper_doi               10.1021/ic400432v
_journal_volume                  52
_journal_year                    2013
_chemical_formula_moiety         'C20 H32 B4 Mo2 Se'
_chemical_formula_sum            'C20 H32 B4 Mo2 Se'
_chemical_formula_weight         586.54
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           86
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4bc'
_symmetry_space_group_name_H-M   'P 42/n :2'
_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            8
_cell_length_a                   24.3557(3)
_cell_length_b                   24.3557(3)
_cell_length_c                   8.4086(2)
_cell_measurement_reflns_used    7505
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.26
_cell_measurement_theta_min      2.37
_cell_volume                     4987.98(15)
_computing_cell_refinement       APEXII,Bruker,2004
_computing_data_collection       APEXII,Bruker,2004
_computing_data_reduction        SAINT,Bruker,2004
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'Bruker ApexII CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0487
_diffrn_reflns_av_sigmaI/netI    0.0747
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            35650
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.82
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    2.468
_exptl_absorpt_correction_T_max  0.7085
_exptl_absorpt_correction_T_min  0.5774
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2004)'
_exptl_crystal_colour            Brown
_exptl_crystal_density_diffrn    1.562
_exptl_crystal_description       Rectangular
_exptl_crystal_F_000             2320
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.025
_refine_diff_density_min         -0.604
_refine_diff_density_rms         0.120
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     293
_refine_ls_number_reflns         6852
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.1601
_refine_ls_R_factor_gt           0.0675
_refine_ls_shift/su_max          0.125
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0945P)^2^+13.7434P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1732
_refine_ls_wR_factor_ref         0.2170
_reflns_number_gt                3321
_reflns_number_total             6852
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic400432v_si_002_2.cif
_cod_data_source_block           2
_cod_original_sg_symbol_Hall     ' -P 4bc '
_cod_original_sg_symbol_H-M      'P 42/n'
_cod_database_code               4335446