1,3,2-Diazaborole-derived carbene complexes of boron.
Hickox, Hunter P.; Wang, Yuzhong; Luedecke, Kaitlin M.; Xie, Yaoming; Wei, Pingrong; Carrillo, Deidrah; Dominique, Nathaniel L.; Cui, Dongtao; Schaefer, Henry F.; Robinson, Gregory H.; Dalton transactions (Cambridge, England : 2003) 47 (2017) 41–44; doi:10.1039/c7dt04079b

data_7044788
_publ_section_title
;
 1,3,2-Diazaborole-derived carbene complexes of boron.
;
_journal_issue                   1
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              41
_journal_page_last               44
_journal_paper_doi               10.1039/c7dt04079b
_journal_volume                  47
_journal_year                    2017
_chemical_formula_sum            'C26 H36 B2 Br4 N2'
_chemical_formula_weight         717.82
_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
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-11-10 deposited with the CCDC.
2017-11-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   19.6037(12)
_cell_length_b                   17.1792(11)
_cell_length_c                   37.549(2)
_cell_measurement_reflns_used    9452
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      24.19
_cell_measurement_theta_min      2.27
_cell_volume                     12645.6(13)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      297(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker D8 Quest PHOTON 100 CMOS'
_diffrn_measurement_method       'Omega\phi scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1521
_diffrn_reflns_av_unetI/netI     0.0898
_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       -22
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       45
_diffrn_reflns_limit_l_min       -45
_diffrn_reflns_number            107342
_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         2.078
_diffrn_source                   Imus
_exptl_absorpt_coefficient_mu    5.108
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.1543
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.508
_exptl_crystal_description       plate
_exptl_crystal_F_000             5696
_exptl_crystal_size_max          0.450
_exptl_crystal_size_mid          0.260
_exptl_crystal_size_min          0.250
_refine_diff_density_max         1.955
_refine_diff_density_min         -1.494
_refine_diff_density_rms         0.102
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     625
_refine_ls_number_reflns         11448
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.1618
_refine_ls_R_factor_gt           0.0734
_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^)+(0.0744P)^2^+51.2858P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1574
_refine_ls_wR_factor_ref         0.1941
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5934
_reflns_number_total             11448
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7dt04079b2.cif
_cod_data_source_block           compound_2
_cod_depositor_comments
'Adding full bibliography for 7044787--7044789.cif.'
_cod_original_cell_volume        12645.5(14)
_cod_database_code               7044788
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.207
_shelx_estimated_absorpt_t_max   0.362
_shelx_res_checksum              13453