Ligand Exchange or Reduction at Multiply Bonded Dimetal Units of Molybdenum and Rhenium by 2,6-Bis(diphenylphosphino)pyridine
F. Albert Cotton; Evgeny V. Dikarev; Glenn T. Jordan; Carlos A. Murillo; Marina A. Petrukhina; Inorganic Chemistry 37 (1998) 4611–4616; doi:10.1021/ic980455d

data_4323004
_publ_section_title
;
 Ligand Exchange or Reduction at Multiply Bonded Dimetal Units of
 Molybdenum and Rhenium by 2,6-Bis(diphenylphosphino)pyridine
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4611
_journal_page_last               4616
_journal_paper_doi               10.1021/ic980455d
_journal_volume                  37
_journal_year                    1998
_chemical_compound_source
;
 Compound was prepared by reacting of [Bu4N]2Re2Cl8 with a (Ph2P)2Py
 ligand in metanol at room temperature. After 2 hours of stirring the 
 solvent was removed from methanol solution leaving a green residue. 
 Crystals were obtained from CH2Cl2 solution layered with hexanes. 
;
_chemical_formula_analytical     'not measured'
_chemical_formula_moiety
;
 Re2 Cl7(((C6 H5)2 P)2 N1 C5 H3) (-), C16 H36 N1 (+), C1 H2 Cl2
;
_chemical_formula_structural     '[n-Bu4N][Re2Cl7((Ph2P)2Py)], CH2Cl2'
_chemical_formula_sum            'C46 H61 Cl9 N2 P2 Re2'
_chemical_formula_weight         1395.36
_chemical_melting_point          ?
_chemical_name_systematic
; 
 Tetra-n-butylammonium-(/m-2,6-bis(Diphenylphosphino)-pyridine-N,P)-
 heptachloro-di-rhenium(III), dichloromethane solvate 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                89.71(2)
_cell_angle_beta                 73.21(1)
_cell_angle_gamma                73.47(2)
_cell_formula_units_Z            4
_cell_length_a                   16.054(2)
_cell_length_b                   18.562(3)
_cell_length_c                   20.205(6)
_cell_measurement_reflns_used    238
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      20.8
_cell_measurement_theta_min      8.0
_cell_volume                     5507(2)
_computing_cell_refinement       'MADNES (Enraf-Nonius, 1989)'
_computing_data_collection       'MADNES (Enraf-Nonius, 1989)'
_computing_data_reduction        'PROCOR (Kabsch, 1988)'
_computing_molecular_graphics    'SHELXTL V.5 (Siemens, 1994)'
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXTL V.5 (Siemens, 1994)'
_diffrn_ambient_temperature      213(2)
_diffrn_measurement_device       'Nonius FAST area detector'
_diffrn_measurement_method       'Ellipsoid-mask fitting'
_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  0.0889
_diffrn_reflns_av_sigmaI/netI    0.0771
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            26493
_diffrn_reflns_theta_max         22.65
_diffrn_reflns_theta_min         2.15
_diffrn_standards_number         'none (area detector data)'
_exptl_absorpt_coefficient_mu    4.920
_exptl_absorpt_correction_T_max  0.784
_exptl_absorpt_correction_T_min  0.612
_exptl_absorpt_correction_type   'SORTAV (Blessing, 1995)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.683
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       plate-shaped
_exptl_crystal_F_000             2736
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.05
_refine_diff_density_max         3.864
_refine_diff_density_min         -1.840
_refine_diff_density_rms         0.287
_refine_ls_extinction_coef       noref
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.091
_refine_ls_goodness_of_fit_obs   1.080
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1009
_refine_ls_number_reflns         13699
_refine_ls_number_restraints     83
_refine_ls_restrained_S_all      1.102
_refine_ls_restrained_S_obs      1.078
_refine_ls_R_factor_all          0.1189
_refine_ls_R_factor_obs          0.0816
_refine_ls_shift/esd_max         0.010
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0756P)^2^+283.5440P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.2217
_refine_ls_wR_factor_obs         0.1859
_reflns_number_observed          10245
_reflns_number_total             13727
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            ic980455d_1.cif
_cod_data_source_block           '[n-Bu4N][Re2Cl7(bdppp)],CH2Cl2'
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1673 2011-04-08 12:14:43Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0756P)^2^+283.5440P] where P=(Fo^2^+2Fc^2^)/3'
was changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0756P)^2^+283.5440P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_database_code               4323004