Models of the iron-only hydrogenase: a comparison of chelate and bridge isomers of Fe2(CO)4{Ph2PN(R)PPh2}(μ-pdt) as proton-reduction catalysts.
Ghosh, Shishir; Hogarth, Graeme; Hollingsworth, Nathan; Holt, Katherine B.; Richards, Idris; Richmond, Michael G.; Sanchez, Ben E.; Unwin, David; Dalton transactions (Cambridge, England : 2003) 42 (2013) 6775–6792; doi:10.1039/c3dt50147g

data_7021256
_publ_section_title
;
 Models of the iron-only hydrogenase: a comparison of chelate and bridge
 isomers of Fe2(CO)4{Ph2PN(R)PPh2}(\m-pdt) as proton-reduction catalysts.
;
_journal_issue                   19
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6775
_journal_page_last               6792
_journal_paper_doi               10.1039/c3dt50147g
_journal_volume                  42
_journal_year                    2013
_chemical_formula_sum            'C34 H31 Fe2 N O4 P2 S2'
_chemical_formula_weight         755.36
_chemical_name_systematic
;
?
;
_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                 100.9190(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.8036(6)
_cell_length_b                   17.9672(12)
_cell_length_c                   18.4965(12)
_cell_measurement_temperature    423(2)
_cell_volume                     3199.0(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      423(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  'Bruker SMART APEX diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_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  0.0281
_diffrn_reflns_av_sigmaI/netI    0.0304
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            27778
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    1.178
_exptl_absorpt_correction_T_max  0.9544
_exptl_absorpt_correction_T_min  0.8159
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.568
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1552
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.746
_refine_diff_density_min         -0.352
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     406
_refine_ls_number_reflns         7641
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0401
_refine_ls_R_factor_gt           0.0330
_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^)+(0.0451P)^2^+1.2266P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0813
_refine_ls_wR_factor_ref         0.0843
_reflns_number_gt                6556
_reflns_number_total             7641
_reflns_threshold_expression     I>2\s(I)
_cod_duplicate_entry             7021255
_cod_data_source_file            c3dt50147g.txt
_cod_data_source_block           str0459
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7021256