Structure, Reactivity, and Density Functional Theory Analysis of the Six-Electron Reductant, [(C5Me5)2U]2(μ-η6:η6-C6H6), Synthesized via a New Mode of (C5Me5)3M Reactivity
William J. Evans; Stosh A. Kozimor; Joseph W. Ziller; Nikolas Kaltsoyannis; Journal of the American Chemical Society 126 (2004) 14533–14547; doi:10.1021/ja0463886

data_4113152
_publ_section_title
;
 Structure, Reactivity, and Density Functional Theory Analysis of the
 Six-Electron Reductant, [(C5Me5)2U]2(\m-\h6:\h6-C6H6), Synthesized via a
 New Mode of (C5Me5)3M Reactivity
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14533
_journal_page_last               14547
_journal_paper_doi               10.1021/ja0463886
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'C44 H86 N2 Si4 U2'
_chemical_formula_weight         1231.57
_chemical_name_systematic
;
  ?
;
_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           SHELXTL
_cell_angle_alpha                107.460(3)
_cell_angle_beta                 99.515(3)
_cell_angle_gamma                90.328(3)
_cell_formula_units_Z            1
_cell_length_a                   8.6030(16)
_cell_length_b                   11.624(2)
_cell_length_c                   13.269(3)
_cell_measurement_temperature    163(2)
_cell_volume                     1246.2(4)
_computing_cell_refinement       'Bruker SMART/SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      163(2)
_diffrn_measured_fraction_theta_full 0.927
_diffrn_measured_fraction_theta_max 0.927
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0194
_diffrn_reflns_av_sigmaI/netI    0.0251
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            12709
_diffrn_reflns_theta_full        28.27
_diffrn_reflns_theta_max         28.27
_diffrn_reflns_theta_min         1.63
_diffrn_standards_decay_%        '< 1.0'
_diffrn_standards_interval_count 'initial 50 frames recollected'
_diffrn_standards_number         '50 frames'
_exptl_absorpt_coefficient_mu    6.615
_exptl_absorpt_correction_T_max  0.5041
_exptl_absorpt_correction_T_min  0.2188
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.641
_exptl_crystal_density_meas      ?
_exptl_crystal_description       plate
_exptl_crystal_F_000             604
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.599
_refine_diff_density_min         -1.935
_refine_diff_density_rms         0.245
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.174
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     407
_refine_ls_number_reflns         5736
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.174
_refine_ls_R_factor_all          0.0186
_refine_ls_R_factor_gt           0.0168
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0323P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0432
_refine_ls_wR_factor_ref         0.0520
_reflns_number_gt                5511
_reflns_number_total             5736
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0463886si20040622_064513_2.cif
_cod_data_source_block           sak34_(241956)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'NA' 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 
;
_cod_database_code               4113152