Synthesis and reactivity of bis(imido) uranium(VI) cyclopentadienyl complexes.
Spencer, Liam P; Gdula, Robyn L; Hayton, Trevor W; Scott, Brian L; Boncella, James M; Chemical communications (Cambridge, England)  (2008) 4986–4988; doi:10.1039/b806075d

data_7103417
_publ_section_title
;
 Synthesis and reactivity of bis(imido) uranium(VI) cyclopentadienyl
 complexes.
;
_journal_issue                   40
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              4986
_journal_page_last               4988
_journal_paper_doi               10.1039/b806075d
_journal_year                    2008
_chemical_formula_sum            'C24 H44 N2 P2 U'
_chemical_formula_weight         660.58
_chemical_name_systematic
;
?
;
_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                 91.546(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.2746(15)
_cell_length_b                   20.362(3)
_cell_length_c                   12.1417(18)
_cell_measurement_temperature    120(1)
_cell_volume                     2539.3(6)
_computing_cell_refinement       'SAINT+, v. 7.06 (Bruker AXS, 2001)'
_computing_data_collection       'APEX II, v. 1.08 (Bruker AXS, 2003)'
_computing_data_reduction        'SAINT+, v. 7.06 (Bruker AXS, 2001)'
_computing_molecular_graphics    'SHELXTL, v. 6.10, (Bruker AXS, 2000)'
_computing_publication_material  'SHELXTL, v. 6.10, (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.945
_diffrn_measurement_device_type  'Bruker D8 with APEXII CCD'
_diffrn_measurement_method       '\w 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  0.0726
_diffrn_reflns_av_sigmaI/netI    0.0602
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            28201
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.37
_diffrn_reflns_theta_min         1.95
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.531
_exptl_absorpt_correction_T_max  0.6231
_exptl_absorpt_correction_T_min  0.3550
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2.03 (Sheldrick, 2001)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.728
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'multifaceted block'
_exptl_crystal_F_000             1296
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.587
_refine_diff_density_min         -1.565
_refine_diff_density_rms         0.178
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.990
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         6013
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.990
_refine_ls_R_factor_all          0.0458
_refine_ls_R_factor_gt           0.0330
_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^)+(0.0324P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0717
_refine_ls_wR_factor_ref         0.0775
_reflns_number_gt                4881
_reflns_number_total             6013
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b806075d.txt
_cod_data_source_block           apx629
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7103417