Homoleptic Uranium(IV) Alkyl Complexes: Synthesis and Characterization
Skye Fortier; Brent C. Melot; Guang Wu; Trevor W. Hayton; Journal of the American Chemical Society 131 (2009) 15512–15521; doi:10.1021/ja906516e

data_4105201
_publ_contact_author_email       hayton@chem.ucsb.edu
_publ_contact_author_name        'Trevor W. Hayton'
_publ_section_title
;
 Homoleptic Uranium(IV) Alkyl Complexes: Synthesis and Characterization
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15512
_journal_page_last               15521
_journal_paper_doi               10.1021/ja906516e
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C18 H50 Li2 N4 U'
_chemical_formula_weight         574.53
_chemical_name_systematic
; 
 Lithium bis(tetramethylethylenediamine) hexamethyl Uranium(IV) 
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   13.9454(17)
_cell_length_b                   15.3124(16)
_cell_length_c                   25.567(3)
_cell_measurement_temperature    150(2)
_cell_volume                     5459.5(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega scan'
_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  0.1160
_diffrn_reflns_av_sigmaI/netI    0.0695
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            43084
_diffrn_reflns_theta_full        26.73
_diffrn_reflns_theta_max         26.73
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    5.952
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.2214
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.398
_exptl_crystal_description       plate
_exptl_crystal_F_000             2272
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.05
_refine_diff_density_max         2.586
_refine_diff_density_min         -1.455
_refine_diff_density_rms         0.226
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         5746
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.1031
_refine_ls_R_factor_gt           0.0568
_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^)+(0.0713P)^2^+18.0757P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1290
_refine_ls_wR_factor_ref         0.1528
_reflns_number_gt                3683
_reflns_number_total             5746
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja906516e_si_001_4.cif
_cod_data_source_block           Complex_4
_cod_original_cell_volume        5459.6(11)
_cod_database_code               4105201