C,C'-bis(benzodiazaborolyl)dicarba-closo-dodecaboranes: synthesis, structures, photophysics and electrochemistry.
Weber, Lothar; Kahlert, Jan; Brockhinke, Regina; Böhling, Lena; Halama, Johannes; Brockhinke, Andreas; Stammler, Hans-Georg; Neumann, Beate; Nervi, Carlo; Harder, Rachel A.; Fox, Mark A.; Dalton transactions (Cambridge, England : 2003) 42 (2013) 10982–10996; doi:10.1039/c3dt51125a

data_7023271
_publ_section_title
;
 C,C'-bis(benzodiazaborolyl)dicarba-closo-dodecaboranes: synthesis,
 structures, photophysics and electrochemistry.
;
_journal_issue                   30
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              10982
_journal_page_last               10996
_journal_paper_doi               10.1039/c3dt51125a
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C22 H23 B N2'
_chemical_formula_sum            'C22 H23 B N2'
_chemical_formula_weight         326.23
_space_group_IT_number           148
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_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                120.00
_cell_formula_units_Z            18
_cell_length_a                   18.3607(6)
_cell_length_b                   18.3607(6)
_cell_length_c                   27.8834(11)
_cell_measurement_reflns_used    7117
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      23.317
_cell_measurement_theta_min      2.664
_cell_volume                     8140.6(5)
_computing_cell_refinement       'APEX2 v2009.11-0 (Bruker AXS, 2009)'
_computing_data_collection       'APEX2 v2009.11-0 (Bruker AXS, 2009)'
_computing_data_reduction        'SAINT (Bruker AXS, 2009)'
_computing_molecular_graphics    'DIAMOND 2.1 (Crystal Impact, 2001)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_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       'Bruker KAPPA APEX II   '
_diffrn_measurement_device_type  'four three circle diffractometer'
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  'graphite monochromator  '
_diffrn_radiation_source         'fine focus sealed tube  '
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0939
_diffrn_reflns_av_sigmaI/netI    0.0557
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            64555
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         2.95
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_T_max  0.9929
_exptl_absorpt_correction_T_min  0.9858
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2008/1 (Bruker AXS, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.198
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             3132
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.351
_refine_diff_density_min         -0.246
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         5272
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.1024
_refine_ls_R_factor_gt           0.0489
_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^)+(0.0451P)^2^+11.6740P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0992
_refine_ls_wR_factor_ref         0.1238
_reflns_number_gt                3323
_reflns_number_total             5272
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt51125a.txt
_cod_data_source_block           compound23
_cod_original_sg_symbol_H-M      'R -3'
_cod_database_code               7023271