Molecular and Electronic Structures by Design: Tuning Symmetrical and Unsymmetrical Linear Trichromium Chains
John F. Berry; F. Albert Cotton; Tongbu Lu; Carlos A. Murillo; Brian K. Roberts; Xiaoping Wang; Journal of the American Chemical Society 126 (2004) 7082–7096; doi:10.1021/ja049055h

data_4112641
_publ_contact_author_address
;  Laboratory for Molecular Structure and Bonding
   Dept. of Chemistry
   Texas A&M University, PO Box  30012
   College Station, TX 77842-3012, USA
;
_publ_contact_author_email       cotton@tamu.edu
_publ_contact_author_fax         '(979) 845 9351'
_publ_contact_author_name        'F. A. Cotton'
_publ_contact_author_phone       '(979) 845 4432'
_publ_section_title
;
 Molecular and Electronic Structures by Design: Tuning Symmetrical and
 Unsymmetrical Linear Trichromium Chains
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7082
_journal_page_last               7096
_journal_paper_doi               10.1021/ja049055h
_journal_volume                  126
_journal_year                    2004
_chemical_formula_moiety         Cr3(C14H16N3)4Cl2I3
_chemical_formula_sum            'C56 H64 Cl2 Cr3 I3 N12'
_chemical_formula_weight         1512.79
_chemical_name_common            '[Cr3(depa)4Cl2]I3'
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           120
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4 -2c'
_symmetry_space_group_name_H-M   'I -4 c 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.9292(12)
_cell_length_b                   17.9292(12)
_cell_length_c                   21.828(3)
_cell_measurement_reflns_used    8530
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.5
_cell_volume                     7016.7(12)
_computing_cell_refinement       SAINT
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      213(2)
_diffrn_measured_fraction_theta_full 0.879
_diffrn_measured_fraction_theta_max 0.879
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0590
_diffrn_reflns_av_sigmaI/netI    0.0647
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            11129
_diffrn_reflns_theta_full        22.46
_diffrn_reflns_theta_max         22.46
_diffrn_reflns_theta_min         10.33
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.893
_exptl_absorpt_correction_T_max  0.6290
_exptl_absorpt_correction_T_min  0.5332
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            'green black'
_exptl_crystal_density_diffrn    1.432
_exptl_crystal_description       block
_exptl_crystal_F_000             2996
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.27
_refine_diff_density_max         1.050
_refine_diff_density_min         -0.516
_refine_diff_density_rms         0.103
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.28(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.088
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         2026
_refine_ls_number_restraints     16
_refine_ls_restrained_S_all      1.113
_refine_ls_R_factor_all          0.1044
_refine_ls_R_factor_gt           0.0984
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1142P)^2^+95.1017P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2526
_refine_ls_wR_factor_ref         0.2588
_reflns_number_gt                1899
_reflns_number_total             2026
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja049055hsi20040409_043050_07.cif
_cod_data_source_block           3
_cod_original_cell_volume        7016.8(11)
_cod_database_code               4112641