Half-Sandwich Complexes of an Extremely Electron-Donating, Redox-Active η6-Diborabenzene Ligand.
Böhnke, Julian; Braunschweig, Holger; Jiménez-Halla, J Oscar C; Krummenacher, Ivo; Stennett, Tom E.; Journal of the American Chemical Society  (2017) –; doi:10.1021/jacs.7b12394

data_4126990
_publ_section_title
;
 Half-Sandwich Complexes of an Extremely Electron-Donating, Redox-Active
 \h6-Diborabenzene Ligand.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.7b12394
_journal_year                    2017
_chemical_formula_moiety         'C54 H74 B2 Cr N2 O3'
_chemical_formula_sum            'C54 H74 B2 Cr N2 O3'
_chemical_formula_weight         872.77
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_secondary   iterative
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   16.205(6)
_cell_length_b                   22.446(5)
_cell_length_c                   27.356(12)
_cell_measurement_reflns_used    9867
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.77
_cell_measurement_theta_min      2.23
_cell_volume                     9950(6)
_computing_cell_refinement       'Saint+ ver. V8.34A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2014.9 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. V8.34A (Bruker AXS)'
_computing_molecular_graphics    'ShelXLe (Huebschle et all, 2011)'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT (Sheldrick, 2012)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CMOS area detector (Photon 100)'
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Quest'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0418
_diffrn_reflns_av_unetI/netI     0.0219
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            100521
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         2.149
_diffrn_source                   'microfocus sealed tube (Incoatec ImS)'
_exptl_absorpt_coefficient_mu    0.273
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.7020
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SadAbs 2014/5 (Bruker AXS)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.165
_exptl_crystal_description       block
_exptl_crystal_F_000             3760
_exptl_crystal_size_max          0.421
_exptl_crystal_size_mid          0.296
_exptl_crystal_size_min          0.103
_refine_diff_density_max         0.361
_refine_diff_density_min         -0.535
_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     592
_refine_ls_number_reflns         10158
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0464
_refine_ls_R_factor_gt           0.0365
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0518P)^2^+4.9991P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0926
_refine_ls_wR_factor_ref         0.0989
_reflns_Friedel_coverage         0.000
_reflns_number_gt                8582
_reflns_number_total             10158
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b12394_si_002.cif
_cod_data_source_block           test_a
_cod_database_code               4126990
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.894
_shelx_estimated_absorpt_t_max   0.972
_shelx_res_checksum              62233
_shelx_hkl_checksum              80412