Synthesis, crystal structure and reactivity of uranium(IV) complexes with p-tert-butylcalix[4]arene ligands.
Salmon, Lionel; Thuéry, Pierre; Asfari, Zouhair; Ephritikhine, Michel; Dalton transactions (Cambridge, England : 2003)  (2006) 3006–3014; doi:10.1039/b601237j

data_7007186
_publ_section_title
;
 Synthesis, crystal structure and reactivity of uranium(IV) complexes
 with p-tert-butylcalix[4]arene ligands.
;
_journal_issue                   24
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3006
_journal_page_last               3014
_journal_paper_doi               10.1039/b601237j
_journal_year                    2006
_chemical_formula_sum            'C176 H209 Cl9 N8 O13 U4'
_chemical_formula_weight         3915.68
_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                 106.145(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   27.1062(5)
_cell_length_b                   21.7001(5)
_cell_length_c                   34.8421(9)
_cell_measurement_reflns_used    377496
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.68
_cell_measurement_theta_min      2.99
_cell_volume                     19686.1(8)
_computing_cell_refinement       'HKL2000 (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Hooft, 1998)'
_computing_data_reduction        'HKL2000 (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1999)'
_computing_publication_material
'SHELXTL (Sheldrick, 1999); PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type
'Nonius Kappa-CCD area-detector diffractometer'
_diffrn_measurement_method       'two \f and five \w scans with 2\% steps'
_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  0.0701
_diffrn_reflns_av_sigmaI/netI    0.1067
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       40
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            377496
_diffrn_reflns_theta_full        25.68
_diffrn_reflns_theta_max         25.68
_diffrn_reflns_theta_min         2.99
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.455
_exptl_absorpt_correction_T_max  0.759
_exptl_absorpt_correction_T_min  0.662
_exptl_absorpt_correction_type   refdelf
_exptl_absorpt_process_details   'SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            'translucent dark brown'
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_meas      ?
_exptl_crystal_description       platelet
_exptl_crystal_F_000             7784
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         3.011
_refine_diff_density_min         -2.537
_refine_diff_density_rms         0.210
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           fullcycle
_refine_ls_number_parameters     1937
_refine_ls_number_reflns         37218
_refine_ls_number_restraints     368
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.1339
_refine_ls_R_factor_gt           0.0768
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1333P)^2^+82.8650P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2124
_refine_ls_wR_factor_ref         0.2382
_reflns_number_gt                23100
_reflns_number_total             37218
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b601237j.txt
_cod_data_source_block           6.3py
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7007186