U(III)-CN versus U(IV)-NC Coordination in Tris(silylamide) Complexes.
Hervé, Alexandre; Bouzidi, Yamina; Berthet, Jean-Claude; Belkhiri, Lotfi; Thuéry, Pierre; Boucekkine, Abdou; Ephritikhine, Michel; Inorganic chemistry 54 (2015) 2474–; doi:10.1021/acs.inorgchem.5b00034

data_4342610
_publ_section_title
;
 U(III)-CN versus U(IV)-NC Coordination in Tris(silylamide) Complexes.
;
_journal_issue                   5
_journal_name_full               'Inorganic chemistry'
_journal_page_first              2474
_journal_paper_doi               10.1021/acs.inorgchem.5b00034
_journal_volume                  54
_journal_year                    2015
_chemical_formula_sum            'C26 H70 F6 N4 O6 S2 Si8 U2'
_chemical_formula_weight         1413.76
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                80.495(3)
_cell_angle_beta                 88.841(2)
_cell_angle_gamma                62.631(3)
_cell_formula_units_Z            1
_cell_length_a                   11.2771(6)
_cell_length_b                   11.4316(5)
_cell_length_c                   11.6871(7)
_cell_measurement_reflns_used    69151
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      30.51
_cell_measurement_theta_min      2.61
_cell_volume                     1316.96(13)
_computing_cell_refinement       'HKL2000 (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction        'HKL2000 (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'SHELXTL (Sheldrick, 2008); PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nonius Kappa-CCD area-detector diffractometer'
_diffrn_measurement_method
'2 \f and 12 \w scans with 2\% steps (661 frames)'
_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  0.0635
_diffrn_reflns_av_unetI/netI     0.0723
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            69151
_diffrn_reflns_theta_full        30.51
_diffrn_reflns_theta_max         30.51
_diffrn_reflns_theta_min         2.61
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.460
_exptl_absorpt_correction_T_max  0.636
_exptl_absorpt_correction_T_min  0.330
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            'translucent light brown'
_exptl_crystal_density_diffrn    1.783
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             684
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.07
_refine_diff_density_max         1.502
_refine_diff_density_min         -1.464
_refine_diff_density_rms         0.150
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         8033
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.0418
_refine_ls_R_factor_gt           0.0311
_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^)+(0.0204P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0642
_refine_ls_wR_factor_ref         0.0666
_reflns_number_gt                6809
_reflns_number_total             8033
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic5b00034_si_001.cif
_cod_data_source_block           5
_cod_database_code               4342610