Indirectly Connected Bis(N-Heterocyclic Carbene) Bimetallic Complexes: Dependence of Metal−Metal Electronic Coupling on Linker Geometry
Tennyson, Andrew G.; Khramov, Dimitri M.; Varnado, C. Daniel; Creswell, Philip T.; Kamplain, Justin W.; Lynch, Vincent M.; Bielawski, Christopher W.; Organometallics 28 (2009) 5142–; doi:10.1021/om9004109

data_4069786
_publ_section_title
;
 Indirectly Connected Bis(N-Heterocyclic Carbene) Bimetallic Complexes:
 Dependence of Metal&#x2212;Metal Electronic Coupling on Linker Geometry
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              5142
_journal_paper_doi               10.1021/om9004109
_journal_volume                  28
_journal_year                    2009
_chemical_formula_moiety         'C40 H54 N6 S2 2-, 2 C5 H5 1-, 2 Fe 2+'
_chemical_formula_sum            'C50 H64 Fe2 N6 S2'
_chemical_formula_weight         924.89
_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                 95.452(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.1802(3)
_cell_length_b                   15.3752(6)
_cell_length_c                   20.6343(9)
_cell_measurement_reflns_used    4816
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     2267.66(16)
_computing_cell_refinement       'Collect software, Nonius B.V. 1998'
_computing_data_collection       'Collect software, Nonius B.V. 1998'
_computing_data_reduction
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_computing_molecular_graphics    'XP SHELXTL/PC, Siemens Analytical'
_computing_structure_refinement  'XL SHELXTL/PC, Siemens Analytical'
_computing_structure_solution
;

SIR97 - Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C., 
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
;
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       \w-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  0.0949
_diffrn_reflns_av_sigmaI/netI    0.1659
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            9653
_diffrn_reflns_theta_full        27.45
_diffrn_reflns_theta_max         27.45
_diffrn_reflns_theta_min         1.65
_exptl_absorpt_coefficient_mu    0.774
_exptl_absorpt_correction_T_max  0.970
_exptl_absorpt_correction_T_min  0.868
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.355
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             980
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.346
_refine_diff_density_min         -0.372
_refine_diff_density_rms         0.088
_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   0.999
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         5162
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.999
_refine_ls_R_factor_all          0.1713
_refine_ls_R_factor_gt           0.0596
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0549P)^2^+0.8490P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1191
_refine_ls_wR_factor_ref         0.1521
_reflns_number_gt                2418
_reflns_number_total             5162
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om9004109_si_002.cif
_cod_data_source_block           fencs2
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4069786