A Basic Strategy for Functionalization of Metal Cyclopentadienyl Complexes: Synthesis, Characterization, and Reactivity of Linear, Butterfly, and Cubic Chromium/Selenium Complexes Containing Functionally Substituted Cyclopentadienyl Ligands
Song, Li-Cheng; Cheng, Hua-Wei; Hu, Qing-Mei; Organometallics 23 (2004) 1072–; doi:10.1021/om034283q

data_4076263
_publ_section_title
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 A Basic Strategy for Functionalization of Metal Cyclopentadienyl
 Complexes:&#x00A0; Synthesis, Characterization, and Reactivity of Linear,
 Butterfly, and Cubic Chromium/Selenium Complexes Containing Functionally
 Substituted Cyclopentadienyl Ligands
;
_journal_issue                   5
_journal_name_full               Organometallics
_journal_page_first              1072
_journal_paper_doi               10.1021/om034283q
_journal_volume                  23
_journal_year                    2004
_chemical_formula_sum            'C28 H38 Cr4 N0 O5 Se4'
_chemical_formula_weight         978.42
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           82
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4'
_symmetry_space_group_name_H-M   'I -4'
_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            2
_cell_length_a                   11.068(3)
_cell_length_b                   11.068(3)
_cell_length_c                   12.901(6)
_cell_measurement_temperature    293(2)
_cell_volume                     1580.4(10)
_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 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.1027
_diffrn_reflns_av_sigmaI/netI    0.1332
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3261
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.42
_exptl_absorpt_coefficient_mu    5.982
_exptl_absorpt_correction_T_max  0.7154
_exptl_absorpt_correction_T_min  0.3163
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    2.056
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             956
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.983
_refine_diff_density_min         -0.495
_refine_diff_density_rms         0.149
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.982
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     93
_refine_ls_number_reflns         1391
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      0.981
_refine_ls_R_factor_all          0.1417
_refine_ls_R_factor_gt           0.0576
_refine_ls_shift/su_max          0.214
_refine_ls_shift/su_mean         0.040
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0810P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1363
_refine_ls_wR_factor_ref         0.1713
_reflns_number_gt                730
_reflns_number_total             1391
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om034283qsi20031107_030500.cif
_cod_data_source_block           020123a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN'
changed to 'multi-scan' 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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1580.3(10)
_cod_original_sg_symbol_H-M      I-4
_cod_database_code               4076263