Synthesis of terminal monochalcogenide and dichalcogenide complexes of uranium using polychalcogenides, [en](2-) (e = te, N = 2; e = se, N = 4), as chalcogen atom transfer reagents.
Smiles, Danil E.; Wu, Guang; Hayton, Trevor W.; Inorganic chemistry 53 (2014) 10240–10247; doi:10.1021/ic501267f

data_4341491
_publ_section_title
;
 Synthesis of terminal monochalcogenide and dichalcogenide complexes of
 uranium using polychalcogenides, [en](2-) (e = te, N = 2; e = se, N = 4),
 as chalcogen atom transfer reagents.
;
_journal_issue                   19
_journal_name_full               'Inorganic chemistry'
_journal_page_first              10240
_journal_page_last               10247
_journal_paper_doi               10.1021/ic501267f
_journal_volume                  53
_journal_year                    2014
_chemical_formula_sum            'C28 H54 K2 N2 O12 Se4'
_chemical_formula_weight         1004.77
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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            4
_cell_length_a                   8.3377(12)
_cell_length_b                   23.532(4)
_cell_length_c                   21.837(3)
_cell_measurement_temperature    100(2)
_cell_volume                     4284.5(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker Kappa Apex II'
_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  0.0869
_diffrn_reflns_av_sigmaI/netI    0.0898
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            14999
_diffrn_reflns_theta_full        26.66
_diffrn_reflns_theta_max         26.66
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    3.671
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.5717
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.558
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2024
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.01
_refine_diff_density_max         2.350
_refine_diff_density_min         -1.185
_refine_diff_density_rms         0.180
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         4496
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.1389
_refine_ls_R_factor_gt           0.0748
_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^)+(0.1180P)^2^+17.0631P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1995
_refine_ls_wR_factor_ref         0.2370
_reflns_number_gt                2602
_reflns_number_total             4496
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic501267f_si_002.cif
_cod_data_source_block           complex4
_cod_original_sg_symbol_H-M      Pbcn
_cod_database_code               4341491