Diboron as a reductant for nickel-catalyzed reductive coupling: rational design and mechanistic studies
Guoying Zhang; Yinjun Xie; Zhengkun Wang; Yang Liu; Hanmin Huang; Chem.Commun. 51 (2015) 1850–; doi:10.1039/C4cc08703H

data_7116436
_publ_section_title
;
 Diboron as a reductant for nickel-catalyzed reductive coupling: rational
 design and mechanistic studies
;
_journal_name_full               Chem.Commun.
_journal_page_first              1850
_journal_paper_doi               10.1039/C4cc08703H
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C56 H42'
_chemical_formula_weight         714.90
_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
_audit_update_record
;
2014-10-09 deposited with the CCDC.
2014-12-19 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 99.210(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   23.491(3)
_cell_length_b                   10.5581(14)
_cell_length_c                   16.883(2)
_cell_measurement_temperature    296(2)
_cell_volume                     4133.3(9)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART APEX II'
_computing_data_reduction        'Bruker SMART'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX II area detector'
_diffrn_measurement_method       '\w 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  0.0284
_diffrn_reflns_av_sigmaI/netI    0.0319
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            10315
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.76
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  0.9840
_exptl_absorpt_correction_T_min  0.9821
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.149
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1512
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.179
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         3640
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.0694
_refine_ls_R_factor_gt           0.0446
_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^)+(0.1200P)^2^+0.0608P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1423
_refine_ls_wR_factor_ref         0.1758
_reflns_number_gt                2608
_reflns_number_total             3640
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc08703h2.cif
_cod_data_source_block           1
_cod_original_cell_volume        4133.4(9)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7116436