Bis(phosphine)boronium salts. Synthesis, structures and coordination chemistry.
Shuttleworth, Timothy A.; Huertos, Miguel A.; Pernik, Indrek; Young, Rowan D.; Weller, Andrew S.; Dalton transactions (Cambridge, England : 2003) 42 (2013) 12917–12925; doi:10.1039/c3dt50817j

data_7021653
_publ_section_title
;
 Bis(phosphine)boronium salts. Synthesis, structures and coordination
 chemistry.
;
_journal_issue                   36
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12917
_journal_page_last               12925
_journal_paper_doi               10.1039/c3dt50817j
_journal_volume                  42
_journal_year                    2013
_chemical_formula_sum            'C16 H40 B Br P2'
_chemical_formula_weight         385.14
_chemical_melting_point          ?
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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            4
_cell_length_a                   10.6330(3)
_cell_length_b                   11.8889(3)
_cell_length_c                   17.0844(7)
_cell_measurement_reflns_used    2684
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      5.097
_cell_volume                     2159.72(12)
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_molecular_graphics    'ORTEP3 (Farrugia, 1997)'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_unetI/netI     0.1193
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            4859
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         5.14
_exptl_absorpt_coefficient_mu    2.044
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.92
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Denzo/Scalepack (Otwinowski & Minor 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.361
_refine_diff_density_min         -0.584
_refine_diff_density_rms         0.085
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.022(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.993
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         4859
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.993
_refine_ls_R_factor_all          0.1030
_refine_ls_R_factor_gt           0.0489
_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^)+(0.0256P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0762
_refine_ls_wR_factor_ref         0.0894
_reflns_number_gt                3263
_reflns_number_total             4859
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt50817j.txt
_cod_data_source_block           1a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

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      'P21 21 21'
_cod_database_code               7021653