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_4335448
_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 H33 B5 Mo2 Se'
_chemical_formula_sum            'C20 H33 B5 Mo2 Se'
_chemical_formula_weight         598.35
_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                   24.1695(2)
_cell_length_b                   24.1695(2)
_cell_length_c                   8.60720(10)
_cell_measurement_reflns_used    12234
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      70.1
_cell_measurement_theta_min      4.1
_cell_volume                     5028.02(8)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd.,'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd.,'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd.,'
_computing_molecular_graphics    Ortep3
_computing_publication_material  Shelx97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 15.9948
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'OXFORD DIFFRACTION SUPER NOVA'
_diffrn_measurement_method       \w/q-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Micro-Focus (Cu) x-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0855
_diffrn_reflns_av_sigmaI/netI    0.0488
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            20653
_diffrn_reflns_theta_full        67.48
_diffrn_reflns_theta_max         67.48
_diffrn_reflns_theta_min         3.66
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    9.821
_exptl_absorpt_correction_T_max  0.435
_exptl_absorpt_correction_T_min  0.312
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrysAlis RED; Oxford Diffraction, 2009)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.581
_exptl_crystal_description       block
_exptl_crystal_F_000             2368
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.14
_refine_diff_density_max         3.897
_refine_diff_density_min         -1.189
_refine_diff_density_rms         0.183
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         4537
_refine_ls_number_restraints     109
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0767
_refine_ls_R_factor_gt           0.0745
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1122P)^2^+60.1709P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1981
_refine_ls_wR_factor_ref         0.2000
_reflns_number_gt                4403
_reflns_number_total             4537
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic400432v_si_002_4.cif
_cod_data_source_block           5
_cod_original_sg_symbol_Hall     ' -P 4bc '
_cod_original_sg_symbol_H-M      'P 42/n'
_cod_database_code               4335448