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_7013795
_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 As2 Cl4 Rh4'
_chemical_formula_weight         1614.54
_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     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.535(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.4012(13)
_cell_length_b                   15.2521(9)
_cell_length_c                   19.4838(11)
_cell_measurement_reflns_used    8282
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.146
_cell_measurement_theta_min      2.292
_cell_volume                     6498.3(7)
_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 0.926
_diffrn_measured_fraction_theta_max 0.926
_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  0.0154
_diffrn_reflns_av_sigmaI/netI    0.0131
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            35365
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.63
_exptl_absorpt_coefficient_mu    2.214
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS2.0 (Sheldrick 2000)'
_exptl_crystal_colour            red-brown
_exptl_crystal_density_diffrn    1.650
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3216
_exptl_crystal_size_max          0.67
_exptl_crystal_size_mid          0.66
_exptl_crystal_size_min          0.63
_refine_diff_density_max         0.664
_refine_diff_density_min         -0.356
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     727
_refine_ls_number_reflns         10588
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0246
_refine_ls_R_factor_gt           0.0222
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0280P)^2^+3.5946P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0531
_refine_ls_wR_factor_ref         0.0540
_reflns_number_gt                9823
_reflns_number_total             10588
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b314734g.txt
_cod_data_source_block           tp5neu
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7013795