Identification of the +2 Oxidation State for Uranium in a Crystalline Molecular Complex, [K(2.2.2-Cryptand)][(C5H4SiMe3)3U]
Matthew R. MacDonald; Megan E. Fieser; Jefferson E. Bates; Joseph W. Ziller; Filipp Furche; William J. Evans; Journal of the American Chemical Society 135 (2013) 13310–13313; doi:10.1021/ja406791t

data_4120776
_publ_section_title
;
 Identification of the +2 Oxidation State for Uranium in a Crystalline
 Molecular Complex, [K(2.2.2-Cryptand)][(C5H4SiMe3)3U]
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13310
_journal_page_last               13313
_journal_paper_doi               10.1021/ja406791t
_journal_volume                  135
_journal_year                    2013
_chemical_formula_sum            'C42 H76 K N2 O6 Si3 U'
_chemical_formula_weight         1066.44
_chemical_name_systematic
; 
 ? 
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 112.5757(8)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.1435(12)
_cell_length_b                   24.8674(17)
_cell_length_c                   13.7813(10)
_cell_measurement_reflns_used    9746
_cell_measurement_temperature    143(2)
_cell_measurement_theta_max      27.70
_cell_measurement_theta_min      2.29
_cell_volume                     5425.0(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      143(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0433
_diffrn_reflns_av_unetI/netI     0.0331
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            58476
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         1.286
_exptl_absorpt_coefficient_mu    3.174
_exptl_absorpt_correction_T_max  0.7659
_exptl_absorpt_correction_T_min  0.4969
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    not_measured
_exptl_crystal_description       irregular
_exptl_crystal_F_000             2172
_exptl_crystal_size_max          0.258
_exptl_crystal_size_mid          0.229
_exptl_crystal_size_min          0.106
_refine_diff_density_max         3.815
_refine_diff_density_min         -1.242
_refine_diff_density_rms         0.097
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     509
_refine_ls_number_reflns         11099
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0492
_refine_ls_R_factor_gt           0.0351
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
; 
 w=1/[\s^2^(Fo^2^)+(0.0405P)^2^+8.8498P] 
 where P=(Fo^2^+2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0800
_refine_ls_wR_factor_ref         0.0855
_reflns_Friedel_coverage         0.000
_reflns_number_gt                9013
_reflns_number_total             11099
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja406791t_si_004.cif
_cod_data_source_block           mrm59_sq_s
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' 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               4120776
_shelx_estimated_absorpt_t_min   0.495
_shelx_estimated_absorpt_t_max   0.730
_shelxl_version_number           2013-2
_shelx_res_checksum              4446