Substitution Reactions at Tetracoordinate Boron: Synthesis of N-Heterocyclic Carbene Boranes with Boron-Heteroatom Bonds
Andrey Solovyev; Qianli Chu; Steven J. Geib; Louis Fensterbank; Max Malacria; Emmanuel Lacôte; Dennis P. Curran; Journal of the American Chemical Society 132 (2010) 15072–15080; doi:10.1021/ja107025y

data_4103360
_publ_section_title
;
 Substitution Reactions at Tetracoordinate Boron: Synthesis of
 N-Heterocyclic Carbene Boranes with Boron-Heteroatom Bonds
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15072
_journal_page_last               15080
_journal_paper_doi               10.1021/ja107025y
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C27 H38 B N3 O2'
_chemical_formula_weight         447.41
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 98.389(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4489(9)
_cell_length_b                   14.8309(14)
_cell_length_c                   19.1914(19)
_cell_measurement_reflns_used    4731
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      23.14
_cell_measurement_theta_min      2.28
_cell_volume                     2660.6(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0435
_diffrn_reflns_av_sigmaI/netI    0.0363
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            22696
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.95
_exptl_absorpt_correction_T_min  0.82
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker Sadabs'
_exptl_crystal_colour            'light red'
_exptl_crystal_density_diffrn    1.117
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             968
_exptl_crystal_size_max          .24
_exptl_crystal_size_mid          .20
_exptl_crystal_size_min          .08
_refine_diff_density_max         0.593
_refine_diff_density_min         -0.364
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.576
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     306
_refine_ls_number_reflns         5241
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.576
_refine_ls_R_factor_all          0.0840
_refine_ls_R_factor_gt           0.0622
_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^)+(0.0780P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1850
_refine_ls_wR_factor_ref         0.1946
_reflns_number_gt                3819
_reflns_number_total             5241
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja107025y_si_007.cif
_cod_data_source_block           as22_75s
_cod_database_code               4103360