The first urea azine molecule and its coordination to uranium in the first actinide guanidinate complexes.
Villiers, Claude; Thuéry, Pierre; Ephritikhine, Michel; Chemical communications (Cambridge, England)  (2007) 2832–2834; doi:10.1039/b705224c

data_7102032
_publ_section_title
;
 The first urea azine molecule and its coordination to uranium in the
 first actinide guanidinate complexes.
;
_journal_issue                   27
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              2832
_journal_page_last               2834
_journal_paper_doi               10.1039/b705224c
_journal_year                    2007
_chemical_formula_sum            'C156 H276 Cl12 N36 U6'
_chemical_formula_weight         4509.71
_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                78.538(7)
_cell_angle_beta                 83.988(8)
_cell_angle_gamma                65.304(8)
_cell_formula_units_Z            1
_cell_length_a                   13.6490(18)
_cell_length_b                   15.660(2)
_cell_length_c                   25.593(4)
_cell_measurement_reflns_used    120010
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.68
_cell_measurement_theta_min      2.95
_cell_volume                     4869.4(12)
_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 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type
'Nonius Kappa-CCD area-detector diffractometer'
_diffrn_measurement_method       'two \f and six \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  0.0947
_diffrn_reflns_av_sigmaI/netI    0.1806
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            120010
_diffrn_reflns_theta_full        25.68
_diffrn_reflns_theta_max         25.68
_diffrn_reflns_theta_min         2.95
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.187
_exptl_absorpt_correction_T_max  0.813
_exptl_absorpt_correction_T_min  0.513
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            'translucent light green'
_exptl_crystal_density_diffrn    1.538
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             2220
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.715
_refine_diff_density_min         -0.859
_refine_diff_density_rms         0.154
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.873
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     946
_refine_ls_number_reflns         18129
_refine_ls_number_restraints     145
_refine_ls_restrained_S_all      0.876
_refine_ls_R_factor_all          0.1619
_refine_ls_R_factor_gt           0.0712
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0834P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1547
_refine_ls_wR_factor_ref         0.1774
_reflns_number_gt                8046
_reflns_number_total             18129
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b705224c.txt
_cod_data_source_block           3
_cod_database_code               7102032