Reactions of P-Donor Ligands with N-Silyl(halogeno)organophosphoranimines: Formation of Cations with P-P Coordination Bonds and Poly(alkyl/aryl)phosphazenes at Ambient Temperature
Keith Huynh; Alan J. Lough; Ian Manners; Journal of the American Chemical Society 128 (2006) 14002–14003; doi:10.1021/ja063979i

data_4111032
_publ_section_title
;
 Reactions of P-Donor Ligands with
 N-Silyl(halogeno)organophosphoranimines: Formation of Cations with P-P
 Coordination Bonds and Poly(alkyl/aryl)phosphazenes at Ambient
 Temperature
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14002
_journal_page_last               14003
_journal_paper_doi               10.1021/ja063979i
_journal_volume                  128
_journal_year                    2006
_chemical_formula_moiety         'C8 H24 N P2 Si, Br'
_chemical_formula_sum            'C8 H24 Br N P2 Si'
_chemical_formula_weight         304.22
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                   11.7432(2)
_cell_length_b                   11.5531(4)
_cell_length_c                   22.8714(9)
_cell_measurement_reflns_used    23642
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.6
_cell_volume                     3102.97(17)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2003)'
_computing_data_reduction        Denzo-SMN
_computing_molecular_graphics    'SHELXTL V6.1'
_computing_publication_material  'SHELXTL V6.1'
_computing_structure_refinement  'SHELXTL V6.1(Sheldrick, 2001)'
_computing_structure_solution    'SIR-92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_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  0.0686
_diffrn_reflns_av_sigmaI/netI    0.0419
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            23642
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         2.63
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.902
_exptl_absorpt_correction_T_max  0.657
_exptl_absorpt_correction_T_min  0.481
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_description       plate
_exptl_crystal_F_000             1264
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.441
_refine_diff_density_min         -0.460
_refine_diff_density_rms         0.077
_refine_ls_extinction_coef       0.0013(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         3544
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0704
_refine_ls_R_factor_gt           0.0395
_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^)+(0.0471P)^2^+0.7610P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0859
_refine_ls_wR_factor_ref         0.0983
_reflns_number_gt                2449
_reflns_number_total             3544
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja063979isi20060606_013231.cif
_cod_data_source_block           k0615a
_cod_database_code               4111032