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_7026523
_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         'C27 H26 Cl2 O2 P2 W, 0.5(C6 H6)'
_chemical_formula_sum            'C30 H29 Cl2 O2 P2 W'
_chemical_formula_weight         738.22
_chemical_name_systematic
;
cis,cis,trans-Dichloro(oxo)carbonylbis(methyldiphenyl
phosphine)tungsten(IV) Hemibenzene solvate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 90.775(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.5417(6)
_cell_length_b                   14.6428(9)
_cell_length_c                   20.463(1)
_cell_measurement_reflns_used    9848
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.268
_cell_measurement_theta_min      2.343
_cell_volume                     2858.8(3)
_computing_cell_refinement       'Bruker APEX2 (Bruker-AXS, 2007)'
_computing_data_collection       'Bruker APEX2 (Bruker-AXS, 2007)'
_computing_data_reduction        'Bruker SAINT+ (Bruker-AXS, 2006)'
_computing_molecular_graphics    'Bruker APEX2 (Bruker-AXS, 2007)'
_computing_publication_material  'Bruker APEX2 (Bruker-AXS, 2007)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker-AXS Smart APEX CCD area detector'
_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  0.0498
_diffrn_reflns_av_sigmaI/netI    0.0296
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            99848
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.34
_exptl_absorpt_coefficient_mu    4.366
_exptl_absorpt_correction_T_max  0.7984
_exptl_absorpt_correction_T_min  0.6224
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'TWINABS (Sheldrick, 2007)'
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.715
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             1452
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.963
_refine_diff_density_min         -1.099
_refine_diff_density_rms         0.112
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     337
_refine_ls_number_reflns         7090
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0290
_refine_ls_R_factor_gt           0.0233
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0088P)^2^+4.0822P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0456
_refine_ls_wR_factor_ref         0.0478
_reflns_number_gt                6335
_reflns_number_total             7090
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0dt00489h.txt
_cod_data_source_block           jpd196_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)/n
_cod_database_code               7026523