Bis(diphenylphosphido) derivatives of the heavier group 2 elements.
Crimmin, Mark R.; Barrett, Anthony G. M.; Hill, Michael S.; Hitchcock, Peter B.; Procopiou, Panayiotis A.; Inorganic chemistry 46 (2007) 10410–10415; doi:10.1021/ic701608x

data_4339403
_publ_section_title
;
 Bis(diphenylphosphido) derivatives of the heavier group 2 elements.
;
_journal_issue                   24
_journal_name_full               'Inorganic chemistry'
_journal_page_first              10410
_journal_page_last               10415
_journal_paper_doi               10.1021/ic701608x
_journal_volume                  46
_journal_year                    2007
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C40 H52 O4 P2 Sr'
_chemical_formula_sum            'C40 H52 O4 P2 Sr'
_chemical_formula_weight         746.38
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.3
_audit_creation_date             2006-04-21T11:49:50-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 104.127(1)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.7671(2)
_cell_length_b                   16.0751(4)
_cell_length_c                   20.9647(5)
_cell_measurement_reflns_used    26530
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.022
_cell_measurement_theta_min      3.395
_cell_measurement_wavelength     0.71073
_cell_volume                     3845.69(15)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_orient_matrix_type       'by Nonius Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      0.780706E-1
_diffrn_orient_matrix_UB_12      -0.242041E-1
_diffrn_orient_matrix_UB_13      -0.4857E-3
_diffrn_orient_matrix_UB_21      -0.264346E-1
_diffrn_orient_matrix_UB_22      -0.75247E-2
_diffrn_orient_matrix_UB_23      -0.487311E-1
_diffrn_orient_matrix_UB_31      0.297609E-1
_diffrn_orient_matrix_UB_32      0.05681
_diffrn_orient_matrix_UB_33      -0.66616E-2
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0482
_diffrn_reflns_av_unetI/netI     0.0406
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            30554
_diffrn_reflns_theta_full        26.01
_diffrn_reflns_theta_max         26.01
_diffrn_reflns_theta_min         3.45
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    1.523
_exptl_absorpt_correction_T_max  0.8068
_exptl_absorpt_correction_T_min  0.7316
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        [c.f. r.h. blessing, acta cryst. (1995), a51, 33-38]
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.289
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1568
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.486
_refine_diff_density_min         -0.388
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     424
_refine_ls_number_reflns         7533
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0384
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0307P)^2^+3.1448P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.079
_refine_ls_wR_factor_ref         0.0873
_reflns_number_gt                5905
_reflns_number_total             7533
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic701608x-file002.cif
_cod_data_source_block           (6)-apr1506
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4339403