Extending the coordination capabilities of tertiary phosphines and arsines: preparation, molecular structure, and reactivity of dinuclear rhodium complexes with PR3 and AsR3 in a doubly bridging coordination mode.
Pechmann, Thomas; Brandt, Carsten D.; Werner, Helmut; Dalton transactions (Cambridge, England : 2003)  (2004) 959–966; doi:10.1039/b314734g

data_7013794
_publ_section_title
;
 Extending the coordination capabilities of tertiary phosphines and
 arsines: preparation, molecular structure, and reactivity of dinuclear
 rhodium complexes with PR3 and AsR3 in a doubly bridging coordination
 mode.
;
_journal_issue                   6
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              959
_journal_page_last               966
_journal_paper_doi               10.1039/b314734g
_journal_year                    2004
_chemical_formula_sum            'C70 H70 Cl4 P2 Rh4'
_chemical_formula_weight         1526.64
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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     Patterson
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 101.8780(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.2854(11)
_cell_length_b                   15.1150(7)
_cell_length_c                   19.2895(9)
_cell_measurement_reflns_used    8804
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.246
_cell_measurement_theta_min      2.303
_cell_volume                     6358.4(5)
_computing_cell_refinement       'SAINT-NT V6.0'
_computing_data_collection       'SMART-NT V5.6'
_computing_data_reduction        'SAINT-NT V6.0'
_computing_molecular_graphics    'XSHELL in SHELXTL-97'
_computing_publication_material  'XSHELL in SHELXTL-97'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Smart Apex with D8-Goniometer'
_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  0.0228
_diffrn_reflns_av_sigmaI/netI    0.0153
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            60158
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.64
_exptl_absorpt_coefficient_mu    1.280
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS2.0 (Sheldick 2000)'
_exptl_crystal_colour            red-brown
_exptl_crystal_density_diffrn    1.595
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3072
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.472
_refine_diff_density_min         -0.351
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     727
_refine_ls_number_reflns         11183
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.0249
_refine_ls_R_factor_gt           0.0228
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0265P)^2^+4.0856P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0541
_refine_ls_wR_factor_ref         0.0551
_reflns_number_gt                10525
_reflns_number_total             11183
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b314734g.txt
_cod_data_source_block           tp4cb
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7013794