Uranium-Nitrogen Multiple Bonding: Isostructural Anionic, Neutral, and Cationic Uranium Nitride Complexes Featuring a Linear U=N=U Core
Alexander R. Fox; Polly L. Arnold; Christopher C. Cummins; Journal of the American Chemical Society 132 (2010) 3250–3251; doi:10.1021/ja910364u

data_4102060
_publ_contact_author_address
;77 Massachusetts Avenue
Room 6-435
Cambridge, MA 02139 USA
;
_publ_contact_author_email       ccummins@mit.edu
_publ_contact_author_name        'Christopher C. Cummins'
_publ_section_title
;
 Uranium-Nitrogen Multiple Bonding: Isostructural Anionic, Neutral, and
 Cationic Uranium Nitride Complexes Featuring a Linear U=N=U Core
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              3250
_journal_page_last               3251
_journal_paper_doi               10.1021/ja910364u
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C76 H118 N7 O U2'
_chemical_formula_weight         1621.83
_chemical_name_common            (u-N)(U(N[t-Bu][3,5-Me2C6H3]3)2
_chemical_name_systematic
; 
 ? 
;
_chemical_properties_physical
'air-sensitive, moisture-sensitive, oxygen-sensitive, paramagnetic'
_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           SHELXL-97
_cell_angle_alpha                111.1200(10)
_cell_angle_beta                 101.095(2)
_cell_angle_gamma                105.7450(10)
_cell_formula_units_Z            1
_cell_length_a                   11.9403(8)
_cell_length_b                   13.8787(9)
_cell_length_c                   13.8923(16)
_cell_measurement_reflns_used    9813
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.54
_cell_measurement_theta_min      2.52
_cell_volume                     1956.0(3)
_computing_cell_refinement       'SAINT 7.46A (Bruker-AXS, 2008)'
_computing_data_collection       'APEX2 3.0 (Bruker-AXS, 2008)'
_computing_data_reduction        'SAINT 7.46A (Bruker-AXS, 2008)'
_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_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       'omega and phi 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  0.0587
_diffrn_reflns_av_sigmaI/netI    0.0479
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            47786
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.66
_exptl_absorpt_coefficient_mu    4.178
_exptl_absorpt_correction_T_max  0.7310
_exptl_absorpt_correction_T_min  0.4887
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.377
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             815
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.08
_refine_diff_density_max         2.064
_refine_diff_density_min         -0.683
_refine_diff_density_rms         0.136
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     443
_refine_ls_number_reflns         9678
_refine_ls_number_restraints     135
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0438
_refine_ls_R_factor_gt           0.0323
_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^)+(0.0450P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0748
_refine_ls_wR_factor_ref         0.0798
_reflns_number_gt                8320
_reflns_number_total             9678
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja910364u_si_001_3.cif
_cod_data_source_block           09112
_cod_depositor_comments
;
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 
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_cod_database_code               4102060