W2Cl4(NR2)2(PR'3)2 Molecules. 5. Preparation and Characterization of W2Cl4(NEt2)2(L-L) (L-L = dmpm, dmpe, dppe), W2Cl4(NBu2)2(L-L) (L-L = dmpm, dmpe), and W2Cl4(NHex2)2(dmpm). First Complexes with Bridging Diphosphine Ligands in a cis,trans-Stereochemistry
F. Albert Cotton; Evgeny V. Dikarev; Wai-Yeung Wong; Inorganic Chemistry 36 (1997) 902–912; doi:10.1021/ic961151z

data_4323333
_publ_section_title
;
 W2Cl4(NR2)2(PR'3)2 Molecules. 5. Preparation and Characterization of
 W2Cl4(NEt2)2(L-L) (L-L = dmpm, dmpe, dppe), W2Cl4(NBu2)2(L-L) (L-L =
 dmpm, dmpe), and W2Cl4(NHex2)2(dmpm). First Complexes with Bridging
 Diphosphine Ligands in a cis,trans-Stereochemistry
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              902
_journal_page_last               912
_journal_paper_doi               10.1021/ic961151z
_journal_volume                  36
_journal_year                    1997
_chemical_compound_source        synthesized
_chemical_formula_analytical     'not measured'
_chemical_formula_moiety         'C21 H50 Cl4 N2 P2 W2'
_chemical_formula_structural     cis,cis-W2Cl4(n-Bu2N)2(DMPM)
_chemical_formula_sum            'C21 H50 Cl4 N2 P2 W2'
_chemical_formula_weight         902.07
_chemical_name_common
;
 cis,cis-Tetrachloro-bis(dibutylamido)-bis(dimethylphosphino)methane
 ditungsten(III)
;
_chemical_name_systematic
; 
 1,1,2,2-Tetrachloro-1,2-bis(dibutylamido)-(cis,cis)-bis(dimethyl-
 phosphino)methane ditungsten(III) 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 103.33(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.011(4)
_cell_length_b                   17.221(4)
_cell_length_c                   21.264(6)
_cell_measurement_reflns_used    250
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      20.8
_cell_measurement_theta_min      9.05
_cell_volume                     6418(3)
_computing_cell_refinement       'MADNES (Enraf-Nonius, 1989)'
_computing_data_collection       'MADNES (Enraf-Nonius, 1989)'
_computing_data_reduction        'MADNES (Enraf-Nonius, 1989)'
_computing_molecular_graphics    'SHELXTL V.5 (Siemens, 1994)'
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      213(2)
_diffrn_measurement_device       'FAST (Enraf-Nonius)'
_diffrn_measurement_method       '\w rotation 0.25\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.1738
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5671
_diffrn_reflns_theta_max         25.18
_diffrn_reflns_theta_min         2.36
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    7.609
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red-brown
_exptl_crystal_density_diffrn    1.867
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       block-shaped
_exptl_crystal_F_000             3488
_exptl_crystal_size_max          0.125
_exptl_crystal_size_mid          0.075
_exptl_crystal_size_min          0.050
_refine_diff_density_max         2.743
_refine_diff_density_min         -1.440
_refine_diff_density_rms         0.284
_refine_ls_extinction_coef       noref
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.916
_refine_ls_goodness_of_fit_obs   1.108
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         5671
_refine_ls_number_restraints     24
_refine_ls_restrained_S_all      0.916
_refine_ls_restrained_S_obs      1.106
_refine_ls_R_factor_all          0.1328
_refine_ls_R_factor_obs          0.0608
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0165P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1495
_refine_ls_wR_factor_obs         0.1254
_reflns_number_observed          2846
_reflns_number_total             5671
_reflns_observed_criterion       I>2\s(I)
_cod_data_source_file            ic961151z_5.cif
_cod_data_source_block           W2Cl4(NBu2)2(DMPM)
_cod_depositor_comments
;
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^)+(0.0165P)^2^+0.0000P] 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^)+(0.0165P)^2^+0.0000P] 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               4323333