New Polycyclic Borazine Species
Xiaochen Xie; Mairi F. Haddow; Stephen M. Mansell; Nicholas C. Norman; Christopher A. Russell; Chem.Commun. 47 (2011) 3748–; doi:10.1039/c1cc10196j

data_7106154
_publ_section_title
;
 New Polycyclic Borazine Species
;
_journal_name_full               Chem.Commun.
_journal_page_first              3748
_journal_paper_doi               10.1039/c1cc10196j
_journal_volume                  47
_journal_year                    2011
_chemical_formula_moiety         'C20 H32 B6 N8, C7 H8'
_chemical_formula_sum            'C27 H40 B6 N8'
_chemical_formula_weight         541.53
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 102.852(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   27.515(5)
_cell_length_b                   12.652(2)
_cell_length_c                   8.8516(14)
_cell_measurement_reflns_used    2013
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      58.64
_cell_measurement_theta_min      3.30
_cell_volume                     3004.2(9)
_computing_cell_refinement       'Bruker PROTEUM'
_computing_data_collection       'Bruker PROTEUM'
_computing_data_reduction        'Bruker SAINT'
_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 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Bruker Microstar CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0672
_diffrn_reflns_av_sigmaI/netI    0.0665
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -30
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            7746
_diffrn_reflns_theta_full        58.97
_diffrn_reflns_theta_max         58.97
_diffrn_reflns_theta_min         3.29
_exptl_absorpt_coefficient_mu    0.544
_exptl_absorpt_correction_T_max  0.7515
_exptl_absorpt_correction_T_min  0.4858
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1152
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.200
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.050
_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     210
_refine_ls_number_reflns         2129
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0731
_refine_ls_R_factor_gt           0.0502
_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^)+(0.0632P)^2^+2.8389P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1223
_refine_ls_wR_factor_ref         0.1351
_reflns_number_gt                1616
_reflns_number_total             2129
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1cc10196j.txt
_cod_data_source_block           3
_cod_original_cell_volume        3004.2(8)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7106154