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_7016140
_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         'C20 H24 P2'
_chemical_formula_sum            'C20 H24 P2'
_chemical_formula_weight         326.33
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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                   8.7796(3)
_cell_length_b                   12.3250(4)
_cell_length_c                   16.0889(5)
_cell_measurement_reflns_used    11533
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.57
_cell_measurement_theta_min      2.53
_cell_volume                     1740.96(10)
_computing_cell_refinement       'Apex II (Bruker-AXS, 2007)'
_computing_data_collection       'Apex II (Bruker-AXS, 2007)'
_computing_data_reduction
;
SAINT v7.34A (Bruker-AXS, 2007) & XPREP v2005/4 (Bruker-AXS, 2005)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.366
_diffrn_detector_type            'Bruker-AXS SMART APEX'
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_details      'frames, 0.3\% width'
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Bruker-AXS Kappa'
_diffrn_measurement_method       '\w & \f scans'
_diffrn_measurement_specimen_support
;
glass fibre
;
_diffrn_radiation_collimation    '0.5 mm double pinhole'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71074
_diffrn_reflns_av_R_equivalents  0.0487
_diffrn_reflns_av_sigmaI/netI    0.0582
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11481
_diffrn_reflns_theta_full        27.57
_diffrn_reflns_theta_max         27.57
_diffrn_reflns_theta_min         2.53
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           40
_diffrn_source_power             2
_diffrn_source_size              '0.4 x 8 mm fine focus'
_diffrn_source_target            Mo
_diffrn_source_type              'Bruker-AXS KFF Mo 2K 90\% Ceramic'
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.245
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6353
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2008/2 (Sheldrick, G.M., 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       nugget
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.089
_exptl_crystal_size_min          0.067
_refine_diff_density_max         0.340
_refine_diff_density_min         -0.311
_refine_diff_density_rms         0.054
_refine_ls_abs_structure_details 'Flack H D (1983), 1710 Friedel Pairs'
_refine_ls_abs_structure_Flack   -0.18(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         3999
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0497
_refine_ls_R_factor_gt           0.0397
_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^)+(0.0427P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0848
_refine_ls_wR_factor_ref         0.0905
_reflns_number_gt                3510
_reflns_number_total             3999
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt10335k.txt
_cod_data_source_block           5a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               7016140