μ-η6,η6-Arene-Bridged Diuranium Hexakisketimide Complexes Isolable in Two States of Charge
Paula L. Diaconescu; Christopher C. Cummins; Inorganic Chemistry 51 (2012) 2902–2916; doi:10.1021/ic202163m

data_4328495
_publ_section_title
;
 \m-\h6,\h6-Arene-Bridged Diuranium Hexakisketimide Complexes Isolable in
 Two States of Charge
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              2902
_journal_page_last               2916
_journal_paper_doi               10.1021/ic202163m
_journal_volume                  51
_journal_year                    2012
_chemical_formula_moiety         'C50 H68 N3 U'
_chemical_formula_sum            'C50 H68 N3 U'
_chemical_formula_weight         949.10
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   11.2787(9)
_cell_length_b                   14.5337(12)
_cell_length_c                   28.312(2)
_cell_measurement_temperature    183(2)
_cell_volume                     4640.9(6)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      183(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0774
_diffrn_reflns_av_sigmaI/netI    0.0557
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            18671
_diffrn_reflns_theta_full        23.26
_diffrn_reflns_theta_max         23.26
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    3.532
_exptl_absorpt_correction_T_max  0.8716
_exptl_absorpt_correction_T_min  0.2338
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Twinabs (Bruker)'
_exptl_crystal_density_diffrn    1.358
_exptl_crystal_F_000             1924
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.941
_refine_diff_density_min         -0.963
_refine_diff_density_rms         0.087
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.003(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     497
_refine_ls_number_reflns         6638
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0394
_refine_ls_R_factor_gt           0.0379
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0338P)^2^+11.4472P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0884
_refine_ls_wR_factor_ref         0.0892
_reflns_number_gt                6433
_reflns_number_total             6638
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic202163m_si_004_6.cif
_cod_data_source_block           2
_cod_original_cell_volume        4640.9(7)
_cod_database_code               4328495