Bifunctional diphosphorus Lewis acids from cyclodiphosphadiazanes.
Davidson, Reagan J; Weigand, Jan J; Burford, Neil; Cameron, T Stanley; Decken, Andreas; Werner-Zwanziger, Ulrike; Chemical communications (Cambridge, England)  (2007) 4671–4673; doi:10.1039/b710853b

data_7102275
_publ_section_title
;
 Bifunctional diphosphorus Lewis acids from cyclodiphosphadiazanes.
;
_journal_issue                   44
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              4671
_journal_page_last               4673
_journal_paper_doi               10.1039/b710853b
_journal_year                    2007
_chemical_formula_sum            'C18 H18 F6 N2 O6 P2 S2'
_chemical_formula_weight         598.40
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 93.012(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.985(4)
_cell_length_b                   10.925(3)
_cell_length_c                   18.101(6)
_cell_measurement_reflns_used    7385
_cell_measurement_temperature    173(1)
_cell_measurement_theta_max      28.09
_cell_measurement_theta_min      2.44
_cell_volume                     2564.2(14)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0393
_diffrn_reflns_av_sigmaI/netI    0.0374
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            17263
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.57
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_type              K760
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.413
_exptl_absorpt_correction_T_max  0.9039
_exptl_absorpt_correction_T_min  0.8361
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1997b)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.550
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Irregular
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.637
_refine_diff_density_min         -0.701
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     329
_refine_ls_number_reflns         5721
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0613
_refine_ls_R_factor_gt           0.0452
_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^)+(0.0497P)^2^+2.5154P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1121
_refine_ls_wR_factor_ref         0.1288
_reflns_number_gt                4520
_reflns_number_total             5721
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            b710853b.txt
_cod_data_source_block           nb070148
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7102275