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_7008618
_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            'C23 H9 Cr Fe2 N3 O11'
_chemical_formula_weight         667.03
_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                 92.6570(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.4281(13)
_cell_length_b                   11.1112(8)
_cell_length_c                   13.4739(10)
_cell_measurement_reflns_used    3587
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      53.191
_cell_measurement_theta_min      5.236
_cell_volume                     2606.4(3)
_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 0.974
_diffrn_measured_fraction_theta_max 0.974
_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  0.0829
_diffrn_reflns_av_sigmaI/netI    0.0715
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            15449
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         1.17
_exptl_absorpt_coefficient_mu    1.573
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.82503
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.700
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1328
_exptl_crystal_size_max          0.256
_exptl_crystal_size_mid          0.227
_exptl_crystal_size_min          0.048
_refine_diff_density_max         0.596
_refine_diff_density_min         -0.497
_refine_diff_density_rms         0.096
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.952
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     369
_refine_ls_number_reflns         5837
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.952
_refine_ls_R_factor_all          0.0637
_refine_ls_R_factor_gt           0.0451
_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^)+(0.0494P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0940
_refine_ls_wR_factor_ref         0.1136
_reflns_number_gt                4274
_reflns_number_total             5837
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b505141j-267653.txt
_cod_data_source_block           cd24252
_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_sg_symbol_H-M      P2(1)/c
_cod_database_code               7008618