A tungsten-mediated closed cycle of reactivity for the reduction of CO(2) to CO.
Jayarathne, Upul; Chandrasekaran, Perumalreddy; Jacobsen, Heiko; Mague, Joel T.; Donahue, James P.; Dalton transactions (Cambridge, England : 2003) 39 (2010) 9662–9671; doi:10.1039/c0dt00489h

data_7026526
_publ_section_title
;
 A tungsten-mediated closed cycle of reactivity for the reduction of CO(2)
 to CO.
;
_journal_issue                   40
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9662
_journal_page_last               9671
_journal_paper_doi               10.1039/c0dt00489h
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C6 H18 Cl4 P2 W'
_chemical_formula_sum            'C6 H18 Cl4 P2 W'
_chemical_formula_weight         477.79
_chemical_name_systematic
;
trans-Tetrachlprobis(trimethylphosphine)tungsten(IV)
;
_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                 99.7170(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.5351(6)
_cell_length_b                   8.4615(8)
_cell_length_c                   13.3258(13)
_cell_measurement_reflns_used    8602
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.71
_cell_measurement_theta_min      2.86
_cell_volume                     726.30(12)
_computing_cell_refinement       'Bruker SAINT (Bruker-AXS 2008)'
_computing_data_collection       'Bruker APEX2 (Bruker-AXS, 2009)'
_computing_data_reduction        'Bruker SAINT (Bruker-AXS 2008)'
_computing_molecular_graphics    'Bruker SHELXTL(Bruker-AXS 2008a)'
_computing_publication_material  'Bruker SHELXTL(Bruker-AXS 2008a)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker APEX-I CCD'
_diffrn_measurement_method       '\f and \w 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  0.0368
_diffrn_reflns_av_sigmaI/netI    0.0209
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            12445
_diffrn_reflns_theta_full        28.71
_diffrn_reflns_theta_max         28.71
_diffrn_reflns_theta_min         2.86
_exptl_absorpt_coefficient_mu    8.870
_exptl_absorpt_correction_T_max  0.3189
_exptl_absorpt_correction_T_min  0.2564
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008a)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    2.185
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.17
_refine_diff_density_max         1.942
_refine_diff_density_min         -1.051
_refine_diff_density_rms         0.143
_refine_ls_extinction_coef       0.0085(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.144
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     65
_refine_ls_number_reflns         1869
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.144
_refine_ls_R_factor_all          0.0221
_refine_ls_R_factor_gt           0.0208
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0304P)^2^+0.7309P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0605
_refine_ls_wR_factor_ref         0.0617
_reflns_number_gt                1720
_reflns_number_total             1869
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0dt00489h.txt
_cod_data_source_block           jpd289_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7026526