Regioselective versus complete chalcogen transfer reactions of the bis(bidentate) phosphine cis,trans,cis-1,2,3,4-tetrakis(diphenylphosphino)cyclobutane: full characterization of new, hemilabile ligands and their complexes with palladium(II) and platinum(II)
Thomas Stampfl; Rene Gutmann; Georg Czermak; Christoph Langes; Alexander Dumfort; Holger Kopacka; Karl-Hans Ongania; Peter Brüggeller; Dalton Trans.  (2003) 3425–3435; doi:10.1039/b305775e

data_7013227
_publ_section_title
;
 Regioselective versus complete chalcogen transfer reactions of the
 bis(bidentate) phosphine
 cis,trans,cis-1,2,3,4-tetrakis(diphenylphosphino)cyclobutane: full
 characterization of new, hemilabile ligands and their complexes with
 palladium(II) and platinum(II)
;
_journal_issue                   17
_journal_name_full               'Dalton Trans.'
_journal_page_first              3425
_journal_page_last               3435
_journal_paper_doi               10.1039/b305775e
_journal_year                    2003
_chemical_formula_moiety         'C52 H44 O4 P4 x C7 H8'
_chemical_formula_sum            'C59 H52 O4 P4'
_chemical_formula_weight         948.94
_chemical_name_systematic        dppcbO4
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n 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            8
_cell_length_a                   31.5748(3)
_cell_length_b                   13.0352(1)
_cell_length_c                   24.7531(3)
_cell_measurement_reflns_used    63312
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      0.998
_cell_volume                     10187.98(18)
_computing_cell_refinement       'Denzo and Scalepack'
_computing_data_collection       'Kappa CCD'
_computing_data_reduction        'Denzo and Scalepack'
_computing_molecular_graphics    'SHELXTL PLUS'
_computing_publication_material  'SHELXTL PLUS'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measurement_device_type  'Kappa CCD'
_diffrn_measurement_method       'phi- and 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  0.024
_diffrn_reflns_av_sigmaI/netI    0.0360
_diffrn_reflns_limit_h_max       40
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            43171
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.195
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.924
_exptl_absorpt_correction_type   Sortav
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.237
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             3984
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.480
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.05(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1216
_refine_ls_number_reflns         14543
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0534
_refine_ls_R_factor_gt           0.0396
_refine_ls_shift/su_max          0.271
_refine_ls_shift/su_mean         0.008
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0568P)^2^+6.6721P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0999
_refine_ls_wR_factor_ref         0.1162
_reflns_number_gt                10328
_reflns_number_total             14543
_reflns_threshold_expression     >3sigma(I)
_cod_data_source_file            b305775e.txt
_cod_data_source_block           II
_cod_original_cell_volume        10188.0(2)
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               7013227
_diffrn_measured_fraction        0.990