Synthesis, Characterization, and Ethylene Polymerization Studies of Chromium, Iron, and Cobalt Complexes Containing 1,3-Bis(imino)-N-Heterocyclic Carbene Ligands
Al Thagfi, Jameel; Lavoie, Gino G.; Organometallics 31 (2012) 2463–; doi:10.1021/om3001058

data_4076597
_publ_section_title
;
 Synthesis, Characterization, and Ethylene Polymerization Studies of
 Chromium, Iron, and Cobalt Complexes Containing
 1,3-Bis(imino)-N-Heterocyclic Carbene Ligands
;
_journal_issue                   6
_journal_name_full               Organometallics
_journal_page_first              2463
_journal_paper_doi               10.1021/om3001058
_journal_volume                  31
_journal_year                    2012
_chemical_formula_moiety         'C23 H26 Cl2 Fe N4, 2(C H2 Cl2)'
_chemical_formula_sum            'C25 H30 Cl6 Fe N4'
_chemical_formula_weight         655.08
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.628(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0305(3)
_cell_length_b                   14.7984(3)
_cell_length_c                   23.3313(8)
_cell_measurement_reflns_used    12761
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.55
_cell_volume                     3107.76(16)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius B.V., 1997-2002)'
_computing_data_reduction        Denzo-SMN
_computing_molecular_graphics    'CAMERON (Watkin, Prout & Pearce, 1996)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1990)'
_computing_structure_solution    'SUPERFLIP (Palatinus L., Chapuis G., 2007)'
_diffrn_ambient_temperature      150(1)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_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  0.0569
_diffrn_reflns_av_sigmaI/netI    0.0716
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            21778
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.65
_exptl_absorpt_coefficient_mu    1.022
_exptl_absorpt_correction_T_max  0.933
_exptl_absorpt_correction_T_min  0.756
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements
 Sortav (Blessing 1995)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.400
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.887
_refine_diff_density_min         -0.561
_refine_diff_density_rms         0.088
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     331
_refine_ls_number_reflns         7091
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.1132
_refine_ls_R_factor_gt           0.0552
_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^)+(0.0868P)^2^+0.3825P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1351
_refine_ls_wR_factor_ref         0.1671
_reflns_number_gt                4171
_reflns_number_total             7091
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            om3001058_si_002.cif
_cod_data_source_block           k10109
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4076597