Synthesis and crystal structure of tetra- and hexanuclear uranium(IV) complexes with hexadentate compartmental Schiff-base ligands.
Salmon, Lionel; Thuéry, Pierre; Ephritikhine, Michel; Dalton transactions (Cambridge, England : 2003)  (2004) 4139–4145; doi:10.1039/b414626c

data_7014274
_publ_section_title
;
 Synthesis and crystal structure of tetra- and hexanuclear uranium(IV)
 complexes with hexadentate compartmental Schiff-base ligands.
;
_journal_issue                   24
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4139
_journal_page_last               4145
_journal_paper_doi               10.1039/b414626c
_journal_year                    2004
_chemical_formula_sum            'C108 H100 Cl4 N16 O16 U4'
_chemical_formula_weight         2971.96
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 112.245(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   15.3462(8)
_cell_length_b                   21.4191(13)
_cell_length_c                   16.8848(7)
_cell_measurement_reflns_used    35118
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.68
_cell_measurement_theta_min      2.61
_cell_volume                     5137.0(5)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Kappa-CCD software (Nonius B.V., 1998)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1999)'
_computing_publication_material  'SHELXTL (Sheldrick, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius Kappa-CCD'
_diffrn_measurement_method       '\f 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  0.1023
_diffrn_reflns_av_sigmaI/netI    0.1018
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            35118
_diffrn_reflns_theta_full        25.68
_diffrn_reflns_theta_max         25.68
_diffrn_reflns_theta_min         2.61
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_exptl_absorpt_coefficient_mu    6.465
_exptl_absorpt_correction_T_max  0.524
_exptl_absorpt_correction_T_min  0.195
_exptl_absorpt_correction_type   refdelf
_exptl_absorpt_process_details   'program DELABS from PLATON (Spek, 2000)'
_exptl_crystal_colour            'translucent dark orange'
_exptl_crystal_density_diffrn    1.921
_exptl_crystal_density_meas      ?
_exptl_crystal_description       irregular
_exptl_crystal_F_000             2848
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.199
_refine_diff_density_min         -2.029
_refine_diff_density_rms         0.186
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.004
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     699
_refine_ls_number_reflns         9710
_refine_ls_number_restraints     175
_refine_ls_restrained_S_all      0.997
_refine_ls_R_factor_all          0.1166
_refine_ls_R_factor_gt           0.0555
_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^)+(0.0672P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1244
_refine_ls_wR_factor_ref         0.1497
_reflns_number_gt                5588
_reflns_number_total             9710
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b414626c.txt
_cod_data_source_block           6b.6py
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7014274