Expanding the Chemistry of Actinide Metallocene Bromides. Synthesis, Properties and Molecular Structures of the Tetravalent and Trivalent Uranium Bromide Complexes: (C5Me4R)2UBr2, (C5Me4R)2U(O-2,6-iPr2C6H3)(Br), and [K(THF)][(C5Me4R)2UBr2] (R = Me, Et)
Lichtscheidl, Alejandro; Pagano, Justin; Scott, Brian; Nelson, Andrew; Kiplinger, Jaqueline; Inorganics 4 (2016) 1–; doi:10.3390/inorganics4010001

data_1542401
_publ_section_title
;
 Expanding the Chemistry of Actinide Metallocene Bromides. Synthesis,
 Properties and Molecular Structures of the Tetravalent and Trivalent
 Uranium Bromide Complexes: (C5Me4R)2UBr2, (C5Me4R)2U(O-2,6-iPr2C6H3)(Br),
 and [K(THF)][(C5Me4R)2UBr2] (R = Me, Et)
;
_journal_issue                   1
_journal_name_full               Inorganics
_journal_page_first              1
_journal_paper_doi               10.3390/inorganics4010001
_journal_volume                  4
_journal_year                    2016
_chemical_formula_sum            'C22 H34 Br2 U'
_chemical_formula_weight         696.34
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           11
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 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                 118.833(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.2013(7)
_cell_length_b                   18.6785(17)
_cell_length_c                   8.4618(8)
_cell_measurement_reflns_used    9875
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      35.11
_cell_measurement_theta_min      2.75
_cell_volume                     1135.55(18)
_computing_cell_refinement       'APEX2 V.2014.7-1 (Bruker AXS, 2014)'
_computing_data_collection       'APEX2 V.2014.7-1 (Bruker AXS, 2014)'
_computing_data_reduction        'SAINT, v. 8.34A (Bruker AXS, 2013)'
_computing_molecular_graphics    'SHELXTL, v. 6.14, (Bruker AXS, 2000)'
_computing_publication_material  'SHELXTL, v. 6.14, (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.949
_diffrn_measurement_device_type  'Bruker D8 Quest with CMOS detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'Bruker Triumph curved graphite'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0362
_diffrn_reflns_av_sigmaI/netI    0.0271
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            25438
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         35.29
_diffrn_reflns_theta_min         2.75
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    10.669
_exptl_absorpt_correction_T_max  0.5670
_exptl_absorpt_correction_T_min  0.1000
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v. 2014/3 (Bruker AXS, 2013)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.037
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.06
_refine_diff_density_max         1.843
_refine_diff_density_min         -3.927
_refine_diff_density_rms         0.358
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.361
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         4967
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.361
_refine_ls_R_factor_all          0.0290
_refine_ls_R_factor_gt           0.0252
_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^)+(0.0383P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0663
_refine_ls_wR_factor_ref         0.0741
_reflns_number_gt                4696
_reflns_number_total             4967
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            dq0103.cif
_cod_data_source_block           dq0103
_cod_original_sg_symbol_H-M      'P 21/m'
_cod_database_code               1542401