Modeling the Syn Disposition of Nitrogen Donors at the Active Sites of Carboxylate-Bridged Diiron Enzymes. Enforcing Dinuclearity and Kinetic Stability with a 1,2-Diethynylbenzene-Based Ligand
Jane Kuzelka; Joshua R. Farrell; Stephen J. Lippard; Inorganic Chemistry 42 (2003) 8652–8662; doi:10.1021/ic034928e

data_4312805
_publ_section_title
;
 Modeling the Syn Disposition of Nitrogen Donors at the Active Sites of
 Carboxylate-Bridged Diiron Enzymes. Enforcing Dinuclearity and Kinetic
 Stability with a 1,2-Diethynylbenzene-Based Ligand
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              8652
_journal_page_last               8662
_journal_paper_doi               10.1021/ic034928e
_journal_volume                  42
_journal_year                    2003
_chemical_formula_sum            'C52 H44 Fe N2 O4'
_chemical_formula_weight         816.74
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 114.962(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.272(5)
_cell_length_b                   16.099(5)
_cell_length_c                   13.652(5)
_cell_measurement_temperature    173(2)
_cell_volume                     4239(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.926
_diffrn_measured_fraction_theta_max 0.926
_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     0.71069
_diffrn_reflns_av_R_equivalents  0.0309
_diffrn_reflns_av_sigmaI/netI    0.0417
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            13206
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.99
_exptl_absorpt_coefficient_mu    0.404
_exptl_absorpt_correction_T_max  1.0000000
_exptl_absorpt_correction_T_min  0.933445
_exptl_absorpt_correction_type   sadabs
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    1.280
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1712
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.339
_refine_diff_density_min         -0.234
_refine_diff_density_rms         0.047
_refine_ls_extinction_coef       0.00000(16)
_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   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     269
_refine_ls_number_reflns         4885
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0708
_refine_ls_R_factor_gt           0.0447
_refine_ls_shift/su_max          0.236
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0479P)^2^+3.4476P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1035
_refine_ls_wR_factor_ref         0.1139
_reflns_number_gt                3598
_reflns_number_total             4885
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic034928esi20030806_110655_1.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4312805