Experimental Evidence for Magnetic Exchange in Di- and Trinuclear Uranium(IV) Ethynylbenzene Complexes
Brian S. Newell; Anthony K. Rappé; Matthew P. Shores; Inorganic Chemistry 49 (2010) 1595–1606; doi:10.1021/ic901986w

data_4314788
_publ_contact_author_address
;Department of Chemistry
Colorado State University
Fort Collins, CO 80521
;
_publ_contact_author_email       shores@lamar.colostate.edu
_publ_contact_author_fax         011(970)4911801
_publ_contact_author_name        'Matthew P. Shores'
_publ_contact_author_phone       011(970)4916033
_publ_section_title
;
 Experimental Evidence for Magnetic Exchange in Di- and Trinuclear
 Uranium(IV) Ethynylbenzene Complexes
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1595
_journal_page_last               1606
_journal_paper_doi               10.1021/ic901986w
_journal_volume                  49
_journal_year                    2010
_chemical_formula_moiety         'C44 H75 Li N4 O Si3 U'
_chemical_formula_sum            'C44 H75 Li N4 O Si3 U'
_chemical_formula_weight         1005.32
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'Bruker SHELXTL'
_cell_angle_alpha                89.144(2)
_cell_angle_beta                 73.6380(10)
_cell_angle_gamma                71.6990(10)
_cell_formula_units_Z            2
_cell_length_a                   11.9798(3)
_cell_length_b                   11.9963(3)
_cell_length_c                   19.0221(5)
_cell_measurement_reflns_used    9715
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     2482.22(11)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0378
_diffrn_reflns_av_sigmaI/netI    0.0428
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            54886
_diffrn_reflns_theta_full        30.51
_diffrn_reflns_theta_max         30.51
_diffrn_reflns_theta_min         1.12
_exptl_absorpt_coefficient_mu    3.376
_exptl_absorpt_correction_T_max  0.6493
_exptl_absorpt_correction_T_min  0.5017
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Sheldrick, 1997'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.345
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.14
_refine_diff_density_max         1.241
_refine_diff_density_min         -0.712
_refine_diff_density_rms         0.108
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     487
_refine_ls_number_reflns         15150
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0374
_refine_ls_R_factor_gt           0.0255
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0184P)^2^+1.8676P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0486
_refine_ls_wR_factor_ref         0.0545
_reflns_number_gt                13056
_reflns_number_total             15150
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic901986w_si_002_2.cif
_cod_data_source_block           msn121
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               4314788