Diphosphanes derived from phobane and phosphatrioxa-adamantane: similarities, differences and anomalies.
Dodds, Deborah L.; Floure, Joelle; Garland, Michael; Haddow, Mairi F.; Leonard, Thomas R.; McMullin, Claire L.; Orpen, A. Guy; Pringle, Paul G.; Dalton transactions (Cambridge, England : 2003) 40 (2011) 7137–7146; doi:10.1039/c1dt10335k

data_7016139
_publ_section_title
;
 Diphosphanes derived from phobane and phosphatrioxa-adamantane:
 similarities, differences and anomalies.
;
_journal_issue                   27
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7137
_journal_page_last               7146
_journal_paper_doi               10.1039/c1dt10335k
_journal_volume                  40
_journal_year                    2011
_chemical_formula_moiety         'C22 H26 O3 P2'
_chemical_formula_sum            'C22 H26 O3 P2'
_chemical_formula_weight         400.37
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 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                   25.664(5)
_cell_length_b                   11.194(2)
_cell_length_c                   7.1808(14)
_cell_measurement_reflns_used    5999
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.408
_cell_measurement_theta_min      2.415
_cell_volume                     2062.9(7)
_computing_cell_refinement       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_collection       'Bruker SMART V5.054 (Bruker, 1998)'
_computing_data_reduction        'Bruker SAINT V6.0 (Bruker, 1998)'
_computing_molecular_graphics    'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_publication_material  'Bruker SHELXTL V6.1 (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.5
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '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  0.0392
_diffrn_reflns_av_sigmaI/netI    0.0315
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            22827
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.82
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.230
_exptl_absorpt_correction_T_max  0.970000
_exptl_absorpt_correction_T_min  0.882983
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.10 (Sheldrick, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.289
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.455
_refine_diff_density_min         -0.200
_refine_diff_density_rms         0.055
_refine_ls_abs_structure_details 'Flack H D (1983), 2182 Friedel pairs'
_refine_ls_abs_structure_Flack   -0.01(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         4751
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0357
_refine_ls_R_factor_gt           0.0339
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0483P)^2^+0.2897P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0825
_refine_ls_wR_factor_ref         0.0834
_reflns_number_gt                4557
_reflns_number_total             4751
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt10335k.txt
_cod_data_source_block           4a
_cod_original_cell_volume        2062.8(7)
_cod_database_code               7016139