Mechanism of NHC-Catalyzed Conjugate Additions of Diboron and Borosilane Reagents to α,β-Unsaturated Carbonyl Compounds.
Wu, Hao; Garcia, Jeannette M.; Haeffner, Fredrik; Radomkit, Suttipol; Zhugralin, Adil R.; Hoveyda, Amir H.; Journal of the American Chemical Society  (2015) 150811140748006–; doi:10.1021/jacs.5b06745

data_4124406
_publ_section_title
;
 Mechanism of NHC-Catalyzed Conjugate Additions of Diboron and Borosilane
 Reagents to \a,\b-Unsaturated Carbonyl Compounds.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              150811140748006
_journal_paper_doi               10.1021/jacs.5b06745
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C41 H36 N2 O'
_chemical_formula_sum            'C41 H36 N2 O'
_chemical_formula_weight         572.72
_space_group_IT_number           145
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 32'
_symmetry_space_group_name_H-M   'P 32'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   9.7301(5)
_cell_length_b                   9.7301(5)
_cell_length_c                   28.7268(16)
_cell_measurement_reflns_used    9895
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      67.48
_cell_measurement_theta_min      3.08
_cell_volume                     2355.3(2)
_computing_cell_refinement       'SAINT (Bruker, 2010)'
_computing_data_collection       'APEX2 (Bruker, 2010)'
_computing_data_reduction        'SAINT (Bruker, 2010)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.975
_diffrn_measurement_device_type  'Bruker Kappa DUO CCD diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0216
_diffrn_reflns_av_sigmaI/netI    0.0187
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            21349
_diffrn_reflns_theta_full        67.00
_diffrn_reflns_theta_max         68.04
_diffrn_reflns_theta_min         5.25
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'Incoatec I\uS'
_exptl_absorpt_coefficient_mu    0.555
_exptl_absorpt_correction_T_max  0.9466
_exptl_absorpt_correction_T_min  0.8971
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G.M. (2008). SADABS v2008/1. Bruker AXS Inc. Madison, WI USA.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.211
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       block
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.174
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.05(17)
_refine_ls_extinction_coef       na
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     408
_refine_ls_number_reflns         5490
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0269
_refine_ls_R_factor_gt           0.0268
_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^)+(0.0439P)^2^+0.3085P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0681
_refine_ls_wR_factor_ref         0.0682
_reflns_number_gt                5482
_reflns_number_total             5490
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja5b06745_si_003.cif
_cod_data_source_block           C41H36N2O
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal'
according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 
;
_cod_original_sg_symbol_H-M      'P 3(2)'
_cod_database_code               4124406