Spontaneous reduction and C-H borylation of arenes mediated by uranium(III) disproportionation.
Arnold, Polly L.; Mansell, Stephen M.; Maron, Laurent; McKay, David; Nature chemistry 4 (2012) 668–674; doi:10.1038/nchem.1392

data_1508249
_publ_section_title
;
 Spontaneous reduction and C-H borylation of arenes mediated by
 uranium(III) disproportionation.
;
_journal_issue                   8
_journal_name_full               'Nature chemistry'
_journal_page_first              668
_journal_page_last               674
_journal_paper_doi               10.1038/nchem.1392
_journal_volume                  4
_journal_year                    2012
_chemical_formula_moiety         'C36 H82 N4 Si8 U2'
_chemical_formula_sum            'C36 H82 N4 Si8 U2'
_chemical_formula_weight         1271.84
_space_group_IT_number           77
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4c'
_symmetry_space_group_name_H-M   'P 42'
_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            2
_cell_length_a                   14.89570(10)
_cell_length_b                   14.89570(10)
_cell_length_c                   12.1430(2)
_cell_measurement_reflns_used    5897
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      27.4225
_cell_measurement_theta_min      3.0518
_cell_volume                     2694.31(5)
_computing_cell_refinement
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CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      170(2)
_diffrn_detector_area_resol_mean 16.1042
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0352
_diffrn_reflns_av_sigmaI/netI    0.0491
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            17409
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.06
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.207
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.72272
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            Black
_exptl_crystal_density_diffrn    1.568
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1244
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.635
_refine_diff_density_min         -0.622
_refine_diff_density_rms         0.091
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.009(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     241
_refine_ls_number_reflns         6014
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0377
_refine_ls_R_factor_gt           0.0278
_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^)+(0.0127P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0509
_refine_ls_wR_factor_ref         0.0541
_reflns_number_gt                5176
_reflns_number_total             6014
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            nchem.1392-s8.cif
_cod_data_source_block           (N'')2U(biphenyl)U(N'')2_complex_4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P4(2)
_cod_database_code               1508249