Planarized Triarylboranes: Stabilization by Structural Constraint and Their Plane-to-Bowl Conversion
Zhiguo Zhou; Atsushi Wakamiya; Tomokatsu Kushida; Shigehiro Yamaguchi; Journal of the American Chemical Society 134 (2012) 4529–4532; doi:10.1021/ja211944q

data_4117673
_publ_section_title
;
 Planarized Triarylboranes: Stabilization by Structural Constraint and
 Their Plane-to-Bowl Conversion
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4529
_journal_page_last               4532
_journal_paper_doi               10.1021/ja211944q
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C27 H27 B'
_chemical_formula_weight         362.30
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_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
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_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.8794(10)
_cell_length_b                   18.5005(18)
_cell_length_c                   11.0075(10)
_cell_measurement_reflns_used    1503
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.5
_cell_measurement_theta_min      2.20
_cell_volume                     2011.9(3)
_computing_molecular_graphics    'ORTEP 3 for windows'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker SMART APAX '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoKa
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0427
_diffrn_reflns_av_sigmaI/netI    0.0557
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
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_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.20
_exptl_absorpt_coefficient_mu    0.066
_exptl_absorpt_correction_T_max  0.9934
_exptl_absorpt_correction_T_min  0.9868
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.196
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.285
_refine_diff_density_min         -0.256
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.096
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         2275
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.0808
_refine_ls_R_factor_gt           0.0480
_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/[?^2^(Fo^2^)+(0.0056P)^2^+0.5000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0696
_refine_ls_wR_factor_ref         0.0738
_reflns_number_gt                1430
_reflns_number_total             2275
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja211944q_si_002_1.cif
_cod_data_source_block           compd1
_cod_database_code               4117673