Quadruply Bonded Dichromium Complexes with Variously Fluorinated Formamidinate Ligands
F. Albert Cotton; Carlos A. Murillo; Isabel Pascual; Inorganic Chemistry 38 (1999) 2182–2187; doi:10.1021/ic990007l

data_4321978
_publ_section_title
;
 Quadruply Bonded Dichromium Complexes with Variously Fluorinated
 Formamidinate Ligands
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              2182
_journal_page_last               2187
_journal_paper_doi               10.1021/ic990007l
_journal_volume                  38
_journal_year                    1999
_chemical_compound_source        synthesis
_chemical_formula_sum            'C52 H36 Cr2 F8 N8'
_chemical_formula_weight         1028.89
_chemical_name_systematic
; 
 Tetrakis (ortho)-fluorophenylformamidinate dichromium (II)
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                117.08(3)
_cell_angle_beta                 96.42(3)
_cell_angle_gamma                107.53(3)
_cell_formula_units_Z            1
_cell_length_a                   10.225(2)
_cell_length_b                   11.312(2)
_cell_length_c                   11.797(2)
_cell_measurement_reflns_used    88
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      16.5
_cell_measurement_theta_min      7.0
_cell_volume                     1107.6(6)
_computing_cell_refinement       MADNES
_computing_data_collection       MADNES
_computing_data_reduction        PROCOR
_computing_molecular_graphics    XP
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      213(2)
_diffrn_measurement_device       'Nonius FAST'
_diffrn_measurement_method       'ellipsoid mask-fitting'
_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  0.0683
_diffrn_reflns_av_sigmaI/netI    0.0538
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            4387
_diffrn_reflns_theta_max         22.49
_diffrn_reflns_theta_min         2.18
_diffrn_standards_number         'none (area detector)'
_exptl_absorpt_coefficient_mu    0.573
_exptl_absorpt_correction_type   'None (N/A)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.543
_exptl_crystal_description       'regular block'
_exptl_crystal_F_000             524
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.662
_refine_diff_density_min         -0.463
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.105
_refine_ls_goodness_of_fit_obs   1.099
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     386
_refine_ls_number_reflns         2584
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.115
_refine_ls_restrained_S_obs      1.099
_refine_ls_R_factor_all          0.0763
_refine_ls_R_factor_obs          0.0625
_refine_ls_shift/esd_max         -4.861
_refine_ls_shift/esd_mean        0.083
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+5.3436P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1637
_refine_ls_wR_factor_obs         0.1471
_reflns_number_observed          2209
_reflns_number_total             2586
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            ic990007l_5.cif
_cod_data_source_block           compound_6
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+5.3436P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+5.3436P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1107.5(4)
_cod_database_code               4321978