Electronic and Structural Effects of Stepwise Borylation and Quaternization on Borirene Aromaticity
Holger Braunschweig; Alexander Damme; Rian D. Dewhurst; Sundargopal Ghosh; Thomas Kramer; Bernd Pfaffinger; Krzysztof Radacki; Alfredo Vargas; Journal of the American Chemical Society 135 (2013) 1903–1911; doi:10.1021/ja3110126

data_4119276
_publ_contact_author_address
; Institut f\"ur Anorganische Chemie
Universit\"at W\"urzburg
Am Hubland
97074 W\"urzburg, Germany
;
_publ_contact_author_email       H.Braunschweig@mail.uni-wuerzburg.de
_publ_contact_author_fax         +49-931-3184623
_publ_contact_author_name        'Prof. Dr. Holger Braunschweig'
_publ_contact_author_phone       +49-931-3185260
_publ_section_title
;
 Electronic and Structural Effects of Stepwise Borylation and
 Quaternization on Borirene Aromaticity
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1903
_journal_page_last               1911
_journal_paper_doi               10.1021/ja3110126
_journal_volume                  135
_journal_year                    2013
_chemical_formula_moiety         'C20 H47 B2 N5 Si3'
_chemical_formula_sum            'C20 H47 B2 N5 Si3'
_chemical_formula_weight         463.52
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                104.2570(32)
_cell_angle_beta                 94.7520(31)
_cell_angle_gamma                91.1370(33)
_cell_formula_units_Z            2
_cell_length_a                   10.7942(7)
_cell_length_b                   11.7520(7)
_cell_length_c                   11.9824(7)
_cell_measurement_reflns_used    5767
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.66
_cell_measurement_theta_min      2.18
_cell_volume                     1466.85(16)
_computing_cell_refinement       'Saint+ ver. 7.53A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2008.3 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. 7.53A (Bruker AXS)'
_computing_molecular_graphics    'XP ver. 5.1 (Bruker AXS, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multi-layer mirror'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0596
_diffrn_reflns_av_sigmaI/netI    0.0616
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            14651
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.73
_diffrn_reflns_theta_min         1.76
_exptl_absorpt_coefficient_mu    0.177
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.4568
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs 2008/1 (Brucker 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.049
_exptl_crystal_description       plate
_exptl_crystal_F_000             508
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.581
_refine_diff_density_min         -0.285
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     286
_refine_ls_number_reflns         6063
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0683
_refine_ls_R_factor_gt           0.0528
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0799P)^2^+0.3437P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1374
_refine_ls_wR_factor_ref         0.1484
_reflns_number_gt                4789
_reflns_number_total             6063
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja3110126_si_001_7.cif
_cod_data_source_block           07
_cod_database_code               4119276