1,2-Diphosphonium dication: a strong P-based Lewis acid in frustrated lewis pair (FLP)-activations of B-H, Si-H, C-H, and H-H bonds.
Holthausen, Michael H.; Bayne, Julia M.; Mallov, Ian; Dobrovetsky, Roman; Stephan, Douglas W.; Journal of the American Chemical Society 137 (2015) 7298–7301; doi:10.1021/jacs.5b04109

data_4129438
_publ_section_title
;
 1,2-Diphosphonium dication: a strong P-based Lewis acid in frustrated
 lewis pair (FLP)-activations of B-H, Si-H, C-H, and H-H bonds.
;
_journal_issue                   23
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7298
_journal_page_last               7301
_journal_paper_doi               10.1021/jacs.5b04109
_journal_volume                  137
_journal_year                    2015
_chemical_formula_moiety         'C19 H34 P, B F4'
_chemical_formula_sum            'C19 H34 B F4 P'
_chemical_formula_weight         380.24
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 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                 96.248(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.2365(19)
_cell_length_b                   8.3072(7)
_cell_length_c                   16.1953(16)
_cell_measurement_reflns_used    9892
_cell_measurement_temperature    149(2)
_cell_measurement_theta_max      54.845
_cell_measurement_theta_min      5.061
_cell_volume                     2037.7(4)
_computing_cell_refinement
'Bruker SMART. Area-Detector Software Package. (Siemens Industrial Automation, 1993, Inc.: Madison, WI)'
_computing_data_collection
'Bruker SMART. Area-Detector Software Package. (Siemens Industrial Automation, 1993, Inc.: Madison, WI)'
_computing_data_reduction
'Bruker SAINT. Area-Detector Integration Software. (Siemens Industrial Automation, 1995, Inc.: Madison, WI)'
_computing_molecular_graphics
'Ortep for Windows (L. J. Farrugia, J. Appl. Cryst. 1997, 30, 565)'
_computing_publication_material
'WinGX v1.70.01 (L. J. Farrugia, J. Appl. Cryst. 1999, 32, 837)'
_computing_structure_refinement
'SHELX-97. Programs for Crystal Structure Analysis. (G. M. Sheldrick, 1997, Release 97-2, University of G&#x00F6;ttingen, Germany)'
_computing_structure_solution
'SHELX-97. Programs for Crystal Structure Analysis. (G. M. Sheldrick, 1997, Release 97-2, University of G&#x00F6;ttingen, Germany)'
_diffrn_ambient_temperature      149(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Apex II CCD detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0294
_diffrn_reflns_av_unetI/netI     0.0317
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            16249
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         2.53
_exptl_absorpt_coefficient_mu    0.169
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.7165
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS. Area-Detector Integration Software. (Siemens Industrial Automation, 1995, Inc.: Madison, WI)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.239
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.244
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.03(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4644
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0338
_refine_ls_R_factor_gt           0.0300
_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^)+(0.0407P)^2^+0.4475P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0714
_refine_ls_wR_factor_ref         0.0736
_reflns_number_gt                4349
_reflns_number_total             4644
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            7[BF4].cif
_cod_data_source_block           7[BF4]
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               4129438