Catalytic Boracarboxylation of Alkynes with Diborane and Carbon Dioxide by an N-Heterocyclic Carbene Copper Catalyst
Liang Zhang; Jianhua Cheng; Béatrice Carry; Zhaomin Hou; Journal of the American Chemical Society 134 (2012) 14314–14317; doi:10.1021/ja3063474

data_4118577
_publ_section_title
;
 Catalytic Boracarboxylation of Alkynes with Diborane and Carbon Dioxide
 by an N-Heterocyclic Carbene Copper Catalyst
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14314
_journal_page_last               14317
_journal_paper_doi               10.1021/ja3063474
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C58 H76 B2 Li2 O12'
_chemical_formula_weight         1000.69
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 99.507(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   13.943(7)
_cell_length_b                   20.195(10)
_cell_length_c                   10.094(5)
_cell_measurement_temperature    163(2)
_cell_volume                     2803(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      163(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_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  0.0509
_diffrn_reflns_av_sigmaI/netI    0.0608
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            14853
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9803
_exptl_absorpt_correction_T_min  0.9756
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.186
_exptl_crystal_description       Block
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.292
_refine_diff_density_min         -0.168
_refine_diff_density_rms         0.038
_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     375
_refine_ls_number_reflns         4872
_refine_ls_number_restraints     40
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.1442
_refine_ls_R_factor_gt           0.0779
_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^)+(0.0975P)^2^+1.4303P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1989
_refine_ls_wR_factor_ref         0.2427
_reflns_number_gt                2494
_reflns_number_total             4872
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja3063474_si_002_3.cif
_cod_data_source_block           3
_cod_database_code               4118577