Complexation and Release of N-Heterocyclic Carbene-Aminoborylene Ligands from Group VI and VIII Metals.
Pranckevicius, Conor; Jimenéz-Halla, J Oscar C; Kirsch, Marius; Krummenacher, Ivo; Braunschweig, Holger; Journal of the American Chemical Society 140 (2018) 10524–10529; doi:10.1021/jacs.8b05398

data_4132664
_publ_section_title
;
 Complexation and Release of N-Heterocyclic Carbene-Aminoborylene Ligands
 from Group VI and VIII Metals.
;
_journal_issue                   33
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10524
_journal_page_last               10529
_journal_paper_doi               10.1021/jacs.8b05398
_journal_volume                  140
_journal_year                    2018
_chemical_formula_moiety         'C50 H68 B2 Br4 N6'
_chemical_formula_sum            'C50 H68 B2 Br4 N6'
_chemical_formula_weight         1094.32
_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'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
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_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
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_cell_length_b                   21.843(8)
_cell_length_c                   25.309(8)
_cell_measurement_reflns_used    9212
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.28
_cell_measurement_theta_min      2.29
_cell_volume                     10739(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1123
_diffrn_reflns_av_unetI/netI     0.0386
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            141948
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.248
_diffrn_reflns_theta_min         2.031
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    3.036
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.5934
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.354
_exptl_crystal_description       block
_exptl_crystal_F_000             4479
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.757
_refine_diff_density_min         -0.574
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     603
_refine_ls_number_reflns         9721
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0582
_refine_ls_R_factor_gt           0.0330
_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^)+(0.0372P)^2^+10.9018P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0724
_refine_ls_wR_factor_ref         0.0834
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7310
_reflns_number_total             9721
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b05398_si_002.cif
_cod_data_source_block           copr015_0ma
_cod_database_code               4132664
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              82872
_shelx_hkl_checksum              25993