N-Heterocyclic Carbene Ligands as Mimics of Imidazoles/Histidine for the Stabilization of Di- and Trinitrosyl Iron Complexes
Jennifer L. Hess; Chung-Hung Hsieh; Joseph H. Reibenspies; Marcetta Y. Darensbourg; Inorganic Chemistry 50 (2011) 8541–8552; doi:10.1021/ic201138f

data_4326138
_publ_contact_author_address
;Department of Chemistry
Texas A&M University
College Station, TX 77843
;
_publ_contact_author_email       marcetta@mail.chem.tamu.edu
_publ_contact_author_name        'Marcetta Y. Darensbourg'
_publ_contact_author_phone       979-845-5417
_publ_section_title
;
 N-Heterocyclic Carbene Ligands as Mimics of Imidazoles/Histidine for the
 Stabilization of Di- and Trinitrosyl Iron Complexes
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              8541
_journal_page_last               8552
_journal_paper_doi               10.1021/ic201138f
_journal_volume                  50
_journal_year                    2011
_chemical_formula_sum            'C9 H16 B F4 Fe N5 O3'
_chemical_formula_weight         384.93
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 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                 96.194(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.1037(16)
_cell_length_b                   15.299(3)
_cell_length_c                   11.452(3)
_cell_measurement_temperature    110(2)
_cell_volume                     1585.7(6)
_computing_cell_refinement       'Bruker FRAMBO'
_computing_data_collection       'Bruker FRAMBO'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.955
_diffrn_measured_fraction_theta_max 0.955
_diffrn_measurement_device_type  'MWPC area detector'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0609
_diffrn_reflns_av_sigmaI/netI    0.0606
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4658
_diffrn_reflns_theta_full        59.98
_diffrn_reflns_theta_max         59.98
_diffrn_reflns_theta_min         5.68
_exptl_absorpt_coefficient_mu    8.231
_exptl_absorpt_correction_T_max  0.9222
_exptl_absorpt_correction_T_min  0.4932
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            'green '
_exptl_crystal_density_diffrn    1.612
_exptl_crystal_description       'needle     '
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.549
_refine_diff_density_min         -0.435
_refine_diff_density_rms         0.079
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.000(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     213
_refine_ls_number_reflns         1840
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0469
_refine_ls_R_factor_gt           0.0428
_refine_ls_shift/su_max          0.027
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0720P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1083
_refine_ls_wR_factor_ref         0.1118
_reflns_number_gt                1715
_reflns_number_total             1840
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic201138f_si_002_6.cif
_cod_data_source_block           5+
_cod_database_code               4326138