What a Difference a 5f Element Makes: Trivalent and Tetravalent Uranium Halide Complexes Supported by One and Two Bis[2-(diisopropylphosphino)-4-methylphenyl]amido (PNP) Ligands
Thibault Cantat; Brian L. Scott; David E. Morris; Jaqueline L. Kiplinger; Inorganic Chemistry 48 (2009) 2114–2127; doi:10.1021/ic802061x

data_4301593
_publ_section_title
;
What a Difference a 5f Element Makes: Trivalent and Tetravalent Uranium
Halide Complexes Supported by One and Two
Bis[2-(diisopropylphosphino)-4-methylphenyl]amido (PNP) Ligands
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              2114
_journal_page_last               2127
_journal_paper_doi               10.1021/ic802061x
_journal_volume                  48
_journal_year                    2009
_chemical_formula_sum            'C38 H64 Cl3 N O3 P2 U'
_chemical_formula_weight         989.22
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   11.9601(14)
_cell_length_b                   14.2707(17)
_cell_length_c                   24.803(3)
_cell_measurement_temperature    120(1)
_cell_volume                     4233.4(9)
_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 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.1153
_diffrn_reflns_av_sigmaI/netI    0.0821
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            40276
_diffrn_reflns_theta_full        25.10
_diffrn_reflns_theta_max         25.10
_diffrn_reflns_theta_min         1.89
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.134
_exptl_absorpt_correction_T_max  0.5576
_exptl_absorpt_correction_T_min  0.5233
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2.03 (Sheldrick, 2001)'
_exptl_crystal_colour            dark
_exptl_crystal_density_diffrn    1.552
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1984
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.16
_platon_squeeze_details
;
Two disordered lattice thf molecules per complex were treated 
using PLATON/SQUEEZE (Spek, A.L. (2003), J.Appl.Cryst. 36, 7-13).
;
_refine_diff_density_max         0.689
_refine_diff_density_min         -1.093
_refine_diff_density_rms         0.136
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.047(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.231
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     323
_refine_ls_number_reflns         7504
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.231
_refine_ls_R_factor_all          0.0526
_refine_ls_R_factor_gt           0.0441
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0226P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0956
_refine_ls_wR_factor_ref         0.0978
_reflns_number_gt                6421
_reflns_number_total             7504
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic802061x_si_001_1.cif
_cod_data_source_block           apx620s
_cod_original_cell_volume        4233.3(9)
_cod_database_code               4301593