Diverse reactions of N-heterocyclic carbenes with an alkynylborane and isolation of a reactive zwitterionic borataallene
Rudiger Bertermann; Holger Braunschweig; Christopher K. L. Brown; Alexander Damme; Rian D. Dewhurst; Christian Horl; Thomas Kramer; Ivo Krummenacher; Bernd Pfaffinger; Krzysztof Radacki; Chem.Commun. 50 (2013) 97–; doi:10.1039/c3cc46947f

data_7110159
_publ_section_title
;
 Diverse reactions of N-heterocyclic carbenes with an alkynylborane and
 isolation of a reactive zwitterionic borataallene
;
_journal_name_full               Chem.Commun.
_journal_page_first              97
_journal_paper_doi               10.1039/c3cc46947f
_journal_volume                  50
_journal_year                    2013
_chemical_formula_moiety         'C41 H47 B N2, C41 H45 B N2,2( C7 H8)'
_chemical_formula_sum            'C96 H108 B2 N4'
_chemical_formula_weight         1339.48
_chemical_name_common
;
?
;
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 104.380(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.913(13)
_cell_length_b                   14.472(9)
_cell_length_c                   24.947(14)
_cell_measurement_temperature    100(2)
_cell_volume                     8013(8)
_computing_cell_refinement       'Saint+ ver. 7.68A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2010.3 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. 7.68A (Bruker AXS)'
_computing_molecular_graphics    'XP ver. 5.1 (Bruker AXS, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker X8-APEX II'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multi-layer mirror'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0981
_diffrn_reflns_av_sigmaI/netI    0.1192
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            80100
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.83
_diffrn_reflns_theta_min         0.92
_exptl_absorpt_coefficient_mu    0.063
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.6210
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs 2008/1 (Bruker 2008)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.110
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2888
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.689
_refine_diff_density_min         -0.581
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1042
_refine_ls_number_reflns         17115
_refine_ls_number_restraints     396
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.2090
_refine_ls_R_factor_gt           0.0878
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1524P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2359
_refine_ls_wR_factor_ref         0.3028
_reflns_number_gt                7221
_reflns_number_total             17115
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc46947f.txt
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7110159