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_4342614
_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            'C32 H78 K N5 O6 Si6 U'
_chemical_formula_weight         1074.66
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 110.476(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.4734(9)
_cell_length_b                   18.469(2)
_cell_length_c                   13.0501(14)
_cell_measurement_reflns_used    109242
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.68
_cell_measurement_theta_min      2.32
_cell_volume                     2590.6(5)
_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 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
'Nonius Kappa-CCD area-detector diffractometer'
_diffrn_measurement_method
'two \f and five \w scans with 2\% steps (642 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  0.0567
_diffrn_reflns_av_unetI/netI     0.0430
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            109242
_diffrn_reflns_theta_full        25.68
_diffrn_reflns_theta_max         25.68
_diffrn_reflns_theta_min         2.32
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.391
_exptl_absorpt_correction_T_max  0.789
_exptl_absorpt_correction_T_min  0.406
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            'translucent light pink'
_exptl_crystal_density_diffrn    1.378
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             1096
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.07
_refine_diff_density_max         1.476
_refine_diff_density_min         -1.525
_refine_diff_density_rms         0.093
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.513(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     571
_refine_ls_number_reflns         9801
_refine_ls_number_restraints     219
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0736
_refine_ls_R_factor_gt           0.0575
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0721P)^2^+6.7684P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1339
_refine_ls_wR_factor_ref         0.1421
_reflns_number_gt                8022
_reflns_number_total             9801
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic5b00034_si_001.cif
_cod_data_source_block           10
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4342614