Reactivity Enhancement of a Zerovalent Diboron Compound by Desymmetrization.
Böhnke, Julian; Arrowsmith, Merle; Braunschweig, Holger; Journal of the American Chemical Society 140 (2018) 10368–10373; doi:10.1021/jacs.8b06930

data_4132841
_publ_section_title
;
 Reactivity Enhancement of a Zerovalent Diboron Compound by
 Desymmetrization.
;
_journal_issue                   32
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10368
_journal_page_last               10373
_journal_paper_doi               10.1021/jacs.8b06930
_journal_volume                  140
_journal_year                    2018
_chemical_formula_moiety         'C47 H74 B2 N4'
_chemical_formula_sum            'C47 H74 B2 N4'
_chemical_formula_weight         716.72
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                100.758(14)
_cell_angle_beta                 92.964(18)
_cell_angle_gamma                107.228(17)
_cell_formula_units_Z            2
_cell_length_a                   9.953(2)
_cell_length_b                   11.3275(18)
_cell_length_c                   20.749(7)
_cell_measurement_reflns_used    9908
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.80
_cell_measurement_theta_min      2.48
_cell_volume                     2180.8(10)
_computing_cell_refinement       'Saint+ ver. V8.34A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2014.9 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. V8.34A (Bruker AXS)'
_computing_molecular_graphics    'ShelXLe (Huebschle et all, 2011)'
_computing_publication_material  'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CMOS area detector (Photon 100)'
_diffrn_detector_area_resol_mean 10.24
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Quest'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multi-layer mirror'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0426
_diffrn_reflns_av_unetI/netI     0.0360
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            45524
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         2.156
_diffrn_source                   'microfocus sealed tube (Incoatec ImS)'
_exptl_absorpt_coefficient_mu    0.062
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.6988
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SadAbs 2014/4 (Bruker AXS)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.091
_exptl_crystal_description       plate
_exptl_crystal_F_000             788
_exptl_crystal_size_max          0.131
_exptl_crystal_size_mid          0.079
_exptl_crystal_size_min          0.045
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.348
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     498
_refine_ls_number_reflns         8907
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0634
_refine_ls_R_factor_gt           0.0463
_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^)+(0.0520P)^2^+0.7283P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1036
_refine_ls_wR_factor_ref         0.1112
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7052
_reflns_number_total             8907
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b06930_si_001.cif
_cod_data_source_block           test_a
_cod_original_cell_volume        2180.9(10)
_cod_database_code               4132841
_shelx_estimated_absorpt_t_min   0.992
_shelx_estimated_absorpt_t_max   0.997
_shelxl_version_number           2014/6
_shelx_res_checksum              52773
_shelx_hkl_checksum              52593