Tetrahalide Complexes of the [U(NR)2]2+ Ion: Synthesis, Theory, and Chlorine K-Edge X-ray Absorption Spectroscopy
Liam P. Spencer; Ping Yang; Stefan G. Minasian; Robert E. Jilek; Enrique R. Batista; Kevin S. Boland; James M. Boncella; Steven D. Conradson; David L. Clark; Trevor W. Hayton; Stosh A. Kozimor; Richard L. Martin; Molly M. MacInnes; Angela C. Olson; Brian L. Scott; David K. Shuh; Marianne P. Wilkerson; Journal of the American Chemical Society 135 (2013) 2279–2290; doi:10.1021/ja310575j

data_4119319
_publ_section_title
;
 Tetrahalide Complexes of the [U(NR)2]2+ Ion: Synthesis, Theory, and
 Chlorine K-Edge X-ray Absorption Spectroscopy
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2279
_journal_page_last               2290
_journal_paper_doi               10.1021/ja310575j
_journal_volume                  135
_journal_year                    2013
_chemical_formula_sum            'C60 H50 Cl4 N2 P2 U'
_chemical_formula_weight         1240.79
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_hydrogens   none
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.191(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.689(4)
_cell_length_b                   19.686(6)
_cell_length_c                   10.718(3)
_cell_measurement_temperature    120(1)
_cell_volume                     2650.0(14)
_computing_cell_refinement       'SAINT+, v. 7.66a (Bruker AXS, 2009)'
_computing_data_collection       'APEX II, v. 7.0 (Bruker AXS, 2009)'
_computing_data_reduction        'SAINT+, v. 7.66a (Bruker AXS, 2009)'
_computing_molecular_graphics    'SHELXTL, v. 6.14, (Bruker AXS, 2000)'
_computing_publication_material  'SHELXTL, v. 6.14, (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker D8 with APEXII CCD'
_diffrn_measurement_method       '\w 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  0.0738
_diffrn_reflns_av_sigmaI/netI    0.0572
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            12500
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.46
_diffrn_reflns_theta_min         1.92
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.365
_exptl_absorpt_correction_T_max  0.7296
_exptl_absorpt_correction_T_min  0.5525
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v. 1 (Sheldrick, 2008)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.555
_exptl_crystal_description       block
_exptl_crystal_F_000             1228
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.654
_refine_diff_density_min         -1.933
_refine_diff_density_rms         0.135
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         2525
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0386
_refine_ls_R_factor_gt           0.0375
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0615P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0915
_refine_ls_wR_factor_ref         0.0923
_reflns_number_gt                2469
_reflns_number_total             2525
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja310575j_si_002_2.cif
_cod_data_source_block           apx942
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               4119319