An asymmetrically substituted borazine
Chivers, Tristram; Fedorchuck, Chantall; Parvez, Masood; Acta Crystallographica Section C 61 (2005) o47–o49; doi:10.1107/S0108270104030410

data_2014694
_publ_section_title
;
 An asymmetrically substituted borazine
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o47
_journal_page_last               o49
_journal_paper_doi               10.1107/S0108270104030410
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C18 H32 B3 F2 N3'
_chemical_formula_moiety         'C18 H32 B3 F2 N3'
_chemical_formula_sum            'C18 H32 B3 F2 N3'
_chemical_formula_weight         360.90
_chemical_name_systematic
;
1,3,5-tri-tert-butyl-2,4-difluoro-6-phenylcyclotriborazane
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 112.19(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.653(4)
_cell_length_b                   13.637(5)
_cell_length_c                   11.893(4)
_cell_measurement_reflns_used    4451
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.5
_cell_measurement_theta_min      2.5
_cell_volume                     2050.3(13)
_computing_cell_refinement       'HKL DENZO (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Hooft, 1998)'
_computing_data_reduction        'SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SAPI91 (Fan, 1991)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.98
_diffrn_measured_fraction_theta_max 0.98
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       ' \w and \f '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.019
_diffrn_reflns_av_sigmaI/netI    0.030
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            4451
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         2.5
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.984
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SORTAV; Blessing, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.169
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             776
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_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.33
_refine_diff_density_min         -0.18
_refine_ls_extinction_method     none
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_refine_ls_matrix_type           full
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_refine_ls_number_reflns         2327
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_refine_ls_R_factor_all          0.049
_refine_ls_R_factor_gt           0.043
_refine_ls_shift/su_max          0.00
_refine_ls_shift/su_mean         0.00
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0664P)^2^+0.77P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.117
_refine_ls_wR_factor_ref         0.124
_reflns_number_gt                2052
_reflns_number_total             2327
_reflns_threshold_expression     'I >2.0 \s(I)'
_cod_data_source_file            gg1227.cif
_cod_data_source_block           III
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

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

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2014694
_cod_database_fobs_code          2014694