Synthesis, structure and reactivity of novel pyridazine-coordinated diiron bridging carbene complexes.
Xiao, Nu; Xu, Qiang; Sun, Jie; Chen, Jiabi; Dalton transactions (Cambridge, England : 2003)  (2005) 3250–3258; doi:10.1039/b505141j

data_7008614
_publ_section_title
;
 Synthesis, structure and reactivity of novel pyridazine-coordinated
 diiron bridging carbene complexes.
;
_journal_issue                   19
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3250
_journal_page_last               3258
_journal_paper_doi               10.1039/b505141j
_journal_year                    2005
_chemical_formula_sum            'C20 H18 Fe2 N2 O7 Si'
_chemical_formula_weight         538.15
_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                 101.456(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3877(19)
_cell_length_b                   15.199(3)
_cell_length_c                   15.666(3)
_cell_measurement_reflns_used    1218
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      40.106
_cell_measurement_theta_min      4.816
_cell_volume                     2424.1(8)
_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      293(2)
_diffrn_measured_fraction_theta_full 0.925
_diffrn_measured_fraction_theta_max 0.925
_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  0.1329
_diffrn_reflns_av_sigmaI/netI    0.2246
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            14085
_diffrn_reflns_theta_full        28.36
_diffrn_reflns_theta_max         28.36
_diffrn_reflns_theta_min         1.89
_exptl_absorpt_coefficient_mu    1.287
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8266
_exptl_absorpt_correction_type   sadabs
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.475
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1096
_refine_diff_density_max         0.353
_refine_diff_density_min         -0.296
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.697
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     312
_refine_ls_number_reflns         5614
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.697
_refine_ls_R_factor_all          0.1949
_refine_ls_R_factor_gt           0.0494
_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^)+(0.0328P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0868
_refine_ls_wR_factor_ref         0.1127
_reflns_number_gt                1640
_reflns_number_total             5614
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b505141j-225627.txt
_cod_data_source_block           cd22119
_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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_cell_volume        2424.2(8)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7008614