Linear Trichromium Complexes with Direct Cr to Cr Contacts. 1. Compounds with Cr3(dipyridylamide)42+ Cores
Rodolphe Clérac; F. Albert Cotton; Lee M. Daniels; Kim R. Dunbar; Carlos A. Murillo; Isabel Pascual; Inorganic Chemistry 39 (2000) 748–751; doi:10.1021/ic990793u

data_4300090
_publ_section_title
;
Linear Trichromium Complexes with Direct Cr to Cr Contacts. 1. Compounds
with Cr3(dipyridylamide)42+ Cores
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              748
_journal_page_last               751
_journal_paper_doi               10.1021/ic990793u
_journal_volume                  39
_journal_year                    2000
_chemical_compound_source        synthesis
_chemical_formula_sum            'C47 H40 Cl2 Cr3 N12'
_chemical_formula_weight         999.81
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.475(2)
_cell_length_b                   14.965(4)
_cell_length_c                   16.4690(13)
_cell_measurement_reflns_used    250
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      18.1
_cell_measurement_theta_min      9.5
_cell_volume                     4553.3(14)
_computing_cell_refinement       MADNES
_computing_data_collection       MADNES
_computing_data_reduction        PROCOR
_computing_molecular_graphics    'SHELXL-93 (Sheldrick, 1993)'
_computing_publication_material  'SHELXL-93 (Sheldrick, 1993)'
_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  0.0773
_diffrn_reflns_av_sigmaI/netI    0.0538
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
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_diffrn_reflns_theta_max         22.51
_diffrn_reflns_theta_min         2.14
_diffrn_standards_number         'None (Area detector)'
_exptl_absorpt_coefficient_mu    0.869
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'dark green'
_exptl_crystal_density_diffrn    1.458
_exptl_crystal_density_meas      ?
_exptl_crystal_description       block-shaped
_exptl_crystal_F_000             2048
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.478
_refine_diff_density_min         -0.288
_refine_diff_density_rms         0.072
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(3)
_refine_ls_extinction_method     none
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_refine_ls_R_factor_obs          0.0499
_refine_ls_shift/esd_max         0.002
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0470P)^2^+12.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1236
_refine_ls_wR_factor_obs         0.1127
_reflns_number_observed          5117
_reflns_number_total             5871
_reflns_observed_criterion       >2sigma(I)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0470P)^2^+12.0000P] 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^)+(0.0470P)^2^+12.0000P] 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        4553.3(13)
_cod_database_code               4300090