N-heterocyclic carbene induced reductive coupling of phosphorus tribromide. Isolation of a bromine bridged P–P bond and its subsequent reactivity.
Waters, Jordan; Everitt, Thomas; Myers, William; Goicoechea, Jose M.; Chem. Sci.  (2016) –; doi:10.1039/C6SC02343F

data_1543706
_publ_section_title
;
 N-heterocyclic carbene induced reductive coupling of phosphorus
 tribromide. Isolation of a bromine bridged P--P bond and its subsequent
 reactivity.
;
_journal_name_full               'Chem. Sci.'
_journal_paper_doi               10.1039/C6SC02343F
_journal_year                    2016
_chemical_formula_moiety         'C54 H72 Br3 N4 P2, C32 H12 B F24'
_chemical_formula_sum            'C86 H84 B Br3 F24 N4 P2'
_chemical_formula_weight         1942.05
_chemical_name_systematic
;
 [{(IPr)PBr}2Br][BArF]
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2016-05-19 deposited with the CCDC.
2016-07-20 downloaded from the CCDC.
;
_cell_angle_alpha                90.4750(10)
_cell_angle_beta                 99.0270(10)
_cell_angle_gamma                105.7270(10)
_cell_formula_units_Z            4
_cell_length_a                   12.82070(10)
_cell_length_b                   23.5342(3)
_cell_length_c                   30.8558(4)
_cell_measurement_reflns_used    70343
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      75.9688
_cell_measurement_theta_min      3.4101
_cell_volume                     8837.79(18)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_molecular_graphics    'WinGX (Farrugia, 2005)'
_computing_publication_material  'XCIF (Sheldrick, 2001)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.4102
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0257
_diffrn_reflns_av_unetI/netI     0.0208
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            127655
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         76.146
_diffrn_reflns_theta_min         3.413
_exptl_absorpt_coefficient_mu    2.880
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.82244
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.460
_exptl_crystal_description       block
_exptl_crystal_F_000             3936
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.260
_exptl_crystal_size_min          0.120
_refine_diff_density_max         1.473
_refine_diff_density_min         -0.876
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     2283
_refine_ls_number_reflns         36533
_refine_ls_number_restraints     31
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0473
_refine_ls_R_factor_gt           0.0427
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0643P)^2^+10.7958P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1163
_refine_ls_wR_factor_ref         0.1209
_reflns_Friedel_coverage         0.000
_reflns_number_gt                33010
_reflns_number_total             36533
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6sc02343f2.cif
_cod_data_source_block           shelx
_cod_database_code               1543706
_shelx_estimated_absorpt_t_min   0.521
_shelx_estimated_absorpt_t_max   0.724
_shelxl_version_number           2013-4
_shelx_res_checksum              7293
_solvent_exptl_crystal_recrystallization_method 'THF, hexane'