Heteronuclear Chains of Four Metal Atoms Including One Quadruply Bonded Dimetal Unit. Dichromium and Dimolybdenum Compounds with Appended Copper(I) Atoms
F. Albert Cotton; Carlos A. Murillo; Lindsay E. Roy; Hong-Cai Zhou; Inorganic Chemistry 39 (2000) 1743–1747; doi:10.1021/ic991274u

data_4320878
_publ_section_title
;
 Heteronuclear Chains of Four Metal Atoms Including One Quadruply Bonded
 Dimetal Unit. Dichromium and Dimolybdenum Compounds with Appended
 Copper(I) Atoms
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1743
_journal_page_last               1747
_journal_paper_doi               10.1021/ic991274u
_journal_volume                  39
_journal_year                    2000
_chemical_compound_source        synthesized
_chemical_formula_analytical     'not measured'
_chemical_formula_moiety         'Cu2 Cr2 (C17 H16 N3)4 (C2 H3 N),2(C2 H3 N)'
_chemical_formula_structural     'Cu2 Cr2 (DPhIP)4 (CH3CN),2(CH3CN)'
_chemical_formula_sum            'C74 H73 Cl4 Cr2 Cu4 N15'
_chemical_formula_weight         1672.43
_chemical_melting_point          ?
_chemical_name_common            none
_chemical_name_systematic
;
 Tetrakis(2,6-di(phenylimino)piperidinato)acetonitriledicopper(I,I)
dichromium(II,II) bis(dichlorocuperate)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 100.52(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.956(8)
_cell_length_b                   17.409(3)
_cell_length_c                   24.674(5)
_cell_measurement_reflns_used    250
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      20.8
_cell_measurement_theta_min      9.05
_cell_volume                     7161(4)
_computing_cell_refinement       'MADNES (Enraf-Nonius, 1989)'
_computing_data_collection       'MADNES (Enraf-Nonius, 1989)'
_computing_data_reduction        'PROCOR (Kabsch, 1988)'
_computing_molecular_graphics    'SHELXTL V.5 (Siemens, 1994)'
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXTL V.5 (Siemens, 1994)'
_diffrn_ambient_temperature      213(2)
_diffrn_measurement_device       'Noniu FAST area detector'
_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  0.0442
_diffrn_reflns_av_sigmaI/netI    0.0348
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            27114
_diffrn_reflns_theta_max         22.63
_diffrn_reflns_theta_min         2.22
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    1.664
_exptl_absorpt_correction_T_max  0.784
_exptl_absorpt_correction_T_min  0.596
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.551
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       block
_exptl_crystal_F_000             3416
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.15
_refine_diff_density_max         2.005
_refine_diff_density_min         -0.705
_refine_diff_density_rms         0.116
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.063
_refine_ls_goodness_of_fit_obs   1.073
_refine_ls_hydrogen_treatment    calc
_refine_ls_matrix_type           full
_refine_ls_number_parameters     890
_refine_ls_number_reflns         9340
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.073
_refine_ls_restrained_S_obs      1.073
_refine_ls_R_factor_all          0.0879
_refine_ls_R_factor_obs          0.0698
_refine_ls_shift/esd_max         0.234
_refine_ls_shift/esd_mean        0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0867P)^2^+43.7118P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1929
_refine_ls_wR_factor_obs         0.1719
_reflns_number_observed          7575
_reflns_number_total             9352
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            ic991274u_3.cif
_cod_data_source_block           xl_compound_3(CH3CN),2(CH3CN)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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^)+(0.0867P)^2^+43.7118P] 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^)+(0.0867P)^2^+43.7118P] 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        7160.9(39)
_cod_database_code               4320878