An electron-poor di-molybdenum triple-decker with a puckered [B4Ru2] bridging ring is an oblato-closo cluster
Bijan Mondal; Bijnaneswar Mondal; Koushik Pal; Babu Varghese; Sundargopal Ghosh; Chem.Commun. 51 (2015) 3828–; doi:10.1039/C4cc09630D

data_7116577
_publ_section_title
;
 An electron-poor di-molybdenum triple-decker with a puckered [B4Ru2]
 bridging ring is an oblato-closo cluster
;
_journal_name_full               Chem.Commun.
_journal_page_first              3828
_journal_paper_doi               10.1039/C4cc09630D
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C22 H36 B4 Mo2 O2'
_chemical_formula_weight         567.63
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           96
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4nw 2abw'
_symmetry_space_group_name_H-M   'P 43 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_block_doi                 10.5517/cc13s2qp
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-12-19 deposited with the CCDC.
2015-01-27 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0041(3)
_cell_length_b                   9.0041(3)
_cell_length_c                   31.3056(10)
_cell_measurement_reflns_used    6562
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.8
_cell_measurement_theta_min      2.6
_cell_volume                     2538.06(14)
_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      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0172
_diffrn_reflns_av_sigmaI/netI    0.0158
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            10681
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.35
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.003
_exptl_absorpt_correction_T_max  0.745
_exptl_absorpt_correction_T_min  0.686
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2012)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.485
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1152
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.517
_refine_diff_density_min         -0.496
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.226
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         2491
_refine_ls_number_restraints     199
_refine_ls_restrained_S_all      1.336
_refine_ls_R_factor_all          0.0331
_refine_ls_R_factor_gt           0.0316
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0267P)^2^+3.2345P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0741
_refine_ls_wR_factor_ref         0.0751
_reflns_number_gt                2405
_reflns_number_total             2491
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc09630d2.cif
_cod_data_source_block           shelxl_1
_cod_original_sg_symbol_H-M      P43212
_cod_database_code               7116577