Isolable diboryl radicals acting as highly efficient reaction intermediates under mild conditions
Feng, Rui; Yang, Wenbang; Wang, Wenqing; Zhao, Yue; Tan, Gengwen; Zhang, Li; Wang, Xinping; Chemical Communications  (2019) –; doi:10.1039/C9CC06514H

data_7124198
_publ_section_title
;
 Isolable diboryl radicals acting as highly efficient reaction
 intermediates under mild conditions
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC06514H
_journal_year                    2019
_chemical_formula_sum            'C10 H16 B O3'
_chemical_formula_weight         195.04
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_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-2014/7
_audit_update_record
;
2019-05-01 deposited with the CCDC.    2019-09-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 99.144(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.0306(5)
_cell_length_b                   11.4395(9)
_cell_length_c                   15.2784(14)
_cell_measurement_reflns_used    3558
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.24
_cell_volume                     1040.62(15)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_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    'SHELXT 2014/4 (Sheldrick, 2014)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker D8 CMOS'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0525
_diffrn_reflns_av_unetI/netI     0.0466
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9178
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.694
_diffrn_reflns_theta_min         2.234
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6560
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.237
_refine_diff_density_rms         0.046
_refine_ls_extinction_coef       0.011(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         2421
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0686
_refine_ls_R_factor_gt           0.0495
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0511P)^2^+0.4504P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1133
_refine_ls_wR_factor_ref         0.1219
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1905
_reflns_number_total             2421
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc06514h2.cif
_cod_data_source_block           5
_cod_database_code               7124198
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.990
_shelx_estimated_absorpt_t_max   0.992
_exptl_absorpt_special_details   'SADABS (Bruker, 2014)'
_shelx_res_checksum              71939