Alkylideneborate zwitterions and C-C coupling by atypical diboration of electron-rich alkynes.
Böhnke, Julian; Braunschweig, Holger; Deißenberger, Andrea; Dellermann, Theresa; Dewhurst, Rian D.; Jiménez-Halla, J Oscar C; Kachel, Stephanie; Kelch, Hauke; Prieschl, Dominic; Chemical communications (Cambridge, England) 53 (2017) 12132–12135; doi:10.1039/c7cc07409c

data_7125317
_publ_section_title
;
 Alkylideneborate zwitterions and C-C coupling by atypical diboration of
 electron-rich alkynes.
;
_journal_issue                   89
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              12132
_journal_page_last               12135
_journal_paper_doi               10.1039/c7cc07409c
_journal_volume                  53
_journal_year                    2017
_chemical_formula_moiety         'C30 H42 B2 Cl2 N2'
_chemical_formula_sum            'C30 H42 B2 Cl2 N2'
_chemical_formula_weight         523.17
_space_group_crystal_system      tetragonal
_space_group_IT_number           96
_space_group_name_Hall           'P 4nw 2abw'
_space_group_name_H-M_alt        'P 43 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-07-05 deposited with the CCDC.
2017-10-11 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.362(3)
_cell_length_b                   12.362(3)
_cell_length_c                   38.073(7)
_cell_measurement_reflns_used    9924
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.84
_cell_measurement_theta_min      2.33
_cell_volume                     5818(2)
_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-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0633
_diffrn_reflns_av_unetI/netI     0.0260
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       47
_diffrn_reflns_limit_l_min       -47
_diffrn_reflns_number            61599
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         26.016
_diffrn_reflns_theta_min         2.140
_diffrn_source                   'microfocus sealed tube (Incoatec ImS)'
_exptl_absorpt_coefficient_mu    0.245
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6778
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SadAbs 2014/5 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.195
_exptl_crystal_description       block
_exptl_crystal_F_000             2240
_exptl_crystal_size_max          0.137
_exptl_crystal_size_mid          0.119
_exptl_crystal_size_min          0.048
_refine_diff_density_max         0.225
_refine_diff_density_min         -0.207
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
;
 Flack x determined using 2054 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.004(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     331
_refine_ls_number_reflns         5726
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0348
_refine_ls_R_factor_gt           0.0302
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0373P)^2^+1.2232P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0695
_refine_ls_wR_factor_ref         0.0714
_reflns_Friedel_coverage         0.701
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                5301
_reflns_number_total             5726
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7cc07409c2.cif
_cod_data_source_block           3
_cod_original_cell_volume        5818(3)
_cod_database_code               7125317
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.967
_shelx_estimated_absorpt_t_max   0.988
_shelx_res_checksum              21783