Ammonia formation by a thiolate-bridged diiron amide complex as a nitrogenase mimic
Yang Li; Ying Li; Baomin Wang; Yi Luo; Dawei Yang; Peng Tong; Jinfeng Zhao; Lun Luo; Yuhan Zhou; Si Chen; Fang Cheng; Jingping Qu; Nature Chemistry 5 (2013) 320–326; doi:10.1038/nchem.1594

data_1552046
_publ_section_title
;
 Ammonia formation by a thiolate-bridged diiron amide complex as a
 nitrogenase mimic
;
_journal_name_full               'Nature Chemistry'
_journal_page_first              320
_journal_page_last               326
_journal_paper_doi               10.1038/nchem.1594
_journal_volume                  5
_journal_year                    2013
_chemical_formula_sum            'C51 H58 B Fe2 N S2'
_chemical_formula_weight         871.61
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 90.383(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.5508(5)
_cell_length_b                   19.5577(8)
_cell_length_c                   18.2624(7)
_cell_measurement_temperature    273(2)
_cell_volume                     4482.7(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SMART'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and 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  0.0640
_diffrn_reflns_av_sigmaI/netI    0.0871
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            23082
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    0.776
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.292
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1840
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.17
_refine_diff_density_max         1.012
_refine_diff_density_min         -0.470
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    'riding mode'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     514
_refine_ls_number_reflns         7868
_refine_ls_number_restraints     161
_refine_ls_restrained_S_all      1.130
_refine_ls_R_factor_all          0.1322
_refine_ls_R_factor_gt           0.0704
_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^)+(0.1053P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1859
_refine_ls_wR_factor_ref         0.2075
_reflns_number_gt                4464
_reflns_number_total             7868
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            nchem.1594-s9.cif
_cod_data_source_block           p21c
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               1552046