A new cyclic borazine species B(8)(NH)(4)(NMe(2))(8) containing a twelve-membered B(8)N(4) ring.
Bramham, George; Charmant, Jonathan P H; Cook, Alistair J R; Norman, Nicholas C; Russell, Christopher A; Saithong, Saowanit; Chemical communications (Cambridge, England)  (2007) 4605–4607; doi:10.1039/b711487g

data_7102279
_publ_section_title
;
 A new cyclic borazine species B(8)(NH)(4)(NMe(2))(8) containing a
 twelve-membered B(8)N(4) ring.
;
_journal_issue                   44
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4605
_journal_page_last               4607
_journal_paper_doi               10.1039/b711487g
_journal_year                    2007
_chemical_formula_moiety         'C16 H52 B8 N12'
_chemical_formula_sum            'C16 H52 B8 N12'
_chemical_formula_weight         499.18
_space_group_IT_number           43
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'F 2 -2d'
_symmetry_space_group_name_H-M   'F d d 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   22.220(4)
_cell_length_b                   28.467(6)
_cell_length_c                   9.5966(19)
_cell_measurement_reflns_used    2522
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.3825
_cell_measurement_theta_min      2.3255
_cell_volume                     6070(2)
_computing_cell_refinement       'SMART v5.628 (Bruker-AXS, 1997-2002)'
_computing_data_collection       'SMART v5.628 (Bruker-AXS, 1997-2002)'
_computing_data_reduction
;
SAINT v7.06A (Bruker-AXS, 1997-2003) & SHELXTL v6.14 (Bruker-AXS, 2003)
;
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.192
_diffrn_detector_type            'Bruker-AXS SMART 1k'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_details      'frames, 0.3\% width'
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker-AXS Platform'
_diffrn_measurement_method       '\w scans'
_diffrn_measurement_specimen_support 'glass fibre'
_diffrn_radiation_collimation    '0.5 mm double pin hole'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71074
_diffrn_reflns_av_R_equivalents  0.0583
_diffrn_reflns_av_sigmaI/netI    0.0309
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       36
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            16769
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.33
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           40
_diffrn_source_power             2
_diffrn_source_target            Mo
_diffrn_source_voltage           50
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.066
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.910
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.092
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2176
_exptl_crystal_size_max          0.303
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.121
_refine_diff_density_max         0.377
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.180
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     177
_refine_ls_number_reflns         1847
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.180
_refine_ls_R_factor_all          0.0547
_refine_ls_R_factor_gt           0.0527
_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^)+(0.0607P)^2^+8.8564P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1246
_refine_ls_wR_factor_ref         0.1256
_reflns_number_gt                1777
_reflns_number_total             1847
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b711487g.txt
_cod_data_source_block           g63-fdd2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray'
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 
;
_cod_original_sg_symbol_H-M      'F d d 2 '
_cod_database_code               7102279