Synthesis and structure of a bis-N-heterocyclic carbene complex of uranium tetrachloride exhibiting short Cl⋯Ccarbene contacts
Gardner, Benedict M.; McMaster, Jonathan; Liddle, Stephen T.; Dalton Transactions  (2009) 6924–; doi:10.1039/b906000f

data_7002099
_publ_section_title
;
 Synthesis and structure of a bis-N-heterocyclic carbene complex of
 uranium tetrachloride exhibiting short Cl&#x22EF;Ccarbene contacts
;
_journal_issue                   35
_journal_name_full               'Dalton Transactions'
_journal_page_first              6924
_journal_paper_doi               10.1039/b906000f
_journal_year                    2009
_chemical_formula_moiety         'C54 H72 Cl4 N4 U, C4 H8 O'
_chemical_formula_sum            'C58 H80 Cl4 N4 O U'
_chemical_formula_weight         1229.09
_chemical_name_systematic
;
?
;
_space_group_IT_number           148
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_atom_sites_solution_hydrogens   'geom, Me from difmap'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'enCIFer editing of SHELXL97 CIF output'
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            18
_cell_length_a                   47.5395(12)
_cell_length_b                   47.5395(12)
_cell_length_c                   13.8960(7)
_cell_measurement_reflns_used    6677
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      21.55
_cell_measurement_theta_min      2.27
_cell_volume                     27197.5(17)
_computing_cell_refinement       'Bruker SAINT version 6.36A (Bruker, 2000)'
_computing_data_collection       'Bruker SMART version 5.625 (Bruker, 2001)'
_computing_data_reduction
'Bruker SAINT; Bruker SHELXTL (Sheldrick, 2008)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material
'enCIFer (Allen et al., 2004); PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART APEX CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0653
_diffrn_reflns_av_sigmaI/netI    0.0423
_diffrn_reflns_limit_h_max       51
_diffrn_reflns_limit_h_min       -51
_diffrn_reflns_limit_k_max       51
_diffrn_reflns_limit_k_min       -51
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            52807
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         1.96
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.901
_exptl_absorpt_correction_T_max  0.89
_exptl_absorpt_correction_T_min  0.70
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2001)'
_exptl_crystal_colour            'Pale green'
_exptl_crystal_density_diffrn    1.351
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             11232
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.852
_refine_diff_density_min         -2.157
_refine_diff_density_rms         0.111
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     629
_refine_ls_number_reflns         7869
_refine_ls_number_restraints     45
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0545
_refine_ls_R_factor_gt           0.0446
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0517P)^2^+279.0135P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1021
_refine_ls_wR_factor_ref         0.1067
_reflns_number_gt                6782
_reflns_number_total             7869
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b906000f.txt
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Hexagonal' changed to 'hexagonal'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'R -3'
_cod_database_code               7002099