Protonation/Reduction of Carbonyl-Rich Diiron Complexes and the Direct Observation of Triprotonated Species: Insights into the Electrocatalytic Mechanism of Hydrogen Formation
Liu, Yu-Chiao; Chu, Kai-Ti; Huang, Yi-Lan; Hsu, Cheng-Huey; Lee, Gene-Hsiang; Tseng, Mei-Chun; Chiang, Ming-Hsi; ACS Catalysis 6 (2016) 2559–; doi:10.1021/acscatal.5b02646

data_4513842
_publ_section_title
;
 Protonation/Reduction of Carbonyl-Rich Diiron Complexes and the Direct
 Observation of Triprotonated Species: Insights into the Electrocatalytic
 Mechanism of Hydrogen Formation
;
_journal_issue                   4
_journal_name_full               'ACS Catalysis'
_journal_page_first              2559
_journal_paper_doi               10.1021/acscatal.5b02646
_journal_volume                  6
_journal_year                    2016
_chemical_formula_sum            'C67 H16 B2 Cl2 F40 Fe4 O12 S4'
_chemical_formula_weight         2216.96
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.7344(5)
_cell_length_b                   14.2966(4)
_cell_length_c                   30.6824(9)
_cell_measurement_reflns_used    6834
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      20.89
_cell_measurement_theta_min      2.26
_cell_volume                     7779.3(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'BRUKER SMART APEXCCD area detector'
_diffrn_measurement_method       'omega 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  0.0635
_diffrn_reflns_av_sigmaI/netI    0.0703
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            53971
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.33
_exptl_absorpt_coefficient_mu    1.064
_exptl_absorpt_correction_T_max  0.8316
_exptl_absorpt_correction_T_min  0.6880
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2001)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.893
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4344
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.745
_refine_diff_density_min         -0.364
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.006(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1195
_refine_ls_number_reflns         17810
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0780
_refine_ls_R_factor_gt           0.0537
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0430P)^2^+2.3800P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1038
_refine_ls_wR_factor_ref         0.1147
_reflns_number_gt                13399
_reflns_number_total             17810
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cs5b02646_si_003.cif
_cod_data_source_block           ic16885
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

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

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 4513842--4513845.cif.
;
_cod_original_sg_symbol_H-M      Pca2(1)
_cod_database_code               4513842