Stepwise Intramolecular Photoisomerization of NHC-Chelate Dimesitylboron Compounds with C-C Bond Formation and C-H Bond Insertion
Ying-Li Rao; Leanne D. Chen; Nicholas J. Mosey; Suning Wang; Journal of the American Chemical Society 134 (2012) 11026–11034; doi:10.1021/ja304211v

data_4118190
_publ_section_title
;
 Stepwise Intramolecular Photoisomerization of NHC-Chelate Dimesitylboron
 Compounds with C-C Bond Formation and C-H Bond Insertion
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11026
_journal_page_last               11034
_journal_paper_doi               10.1021/ja304211v
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C27 H29 B N2'
_chemical_formula_weight         392.33
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 100.955(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.909(4)
_cell_length_b                   11.611(4)
_cell_length_c                   30.691(9)
_cell_measurement_temperature    293(2)
_cell_volume                     4516(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_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  0.0539
_diffrn_reflns_av_sigmaI/netI    0.0972
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            7806
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.38
_exptl_absorpt_coefficient_mu    0.066
_exptl_absorpt_correction_T_max  0.9980
_exptl_absorpt_correction_T_min  0.9967
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_density_diffrn    1.154
_exptl_crystal_F_000             1680
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.392
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.048
_refine_ls_extinction_coef       0.0022(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     278
_refine_ls_number_reflns         4393
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.1708
_refine_ls_R_factor_gt           0.0937
_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^)+(0.0380P)^2^+14.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1971
_refine_ls_wR_factor_ref         0.2343
_reflns_number_gt                2267
_reflns_number_total             4393
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja304211v_si_006.cif
_cod_data_source_block           yr43
_cod_database_code               4118190