Reactivity of the uranium(iv) carbene complex [U(BIPM(TMS))(Cl)(μ-Cl)2Li(THF)2] (BIPM(TMS) = {C(PPh2NSiMe3)2}) towards carbonyl and heteroallene substrates: metallo-Wittig, adduct formation, C-F bond activation, and [2 + 2]-cycloaddition reactions.
Cooper, Oliver J.; Mills, David P.; Lewis, William; Blake, Alexander J.; Liddle, Stephen T.; Dalton transactions (Cambridge, England : 2003) 43 (2014) 14275–14283; doi:10.1039/c4dt00909f

data_7030378
_publ_section_title
;
 Reactivity of the uranium(iv) carbene complex
 [U(BIPM(TMS))(Cl)(\m-Cl)2Li(THF)2] (BIPM(TMS) = {C(PPh2NSiMe3)2}) towards
 carbonyl and heteroallene substrates: metallo-Wittig, adduct formation,
 C-F bond activation, and [2 + 2]-cycloaddition reactions.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              14275
_journal_page_last               14283
_journal_paper_doi               10.1039/c4dt00909f
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         'C20 H20 Cl2 F2 N4 U'
_chemical_formula_sum            'C20 H20 Cl2 F2 N4 U'
_chemical_formula_weight         663.33
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_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                 124.27(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.116(4)
_cell_length_b                   9.6551(19)
_cell_length_c                   15.002(3)
_cell_measurement_reflns_used    7412
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.51
_cell_volume                     2168.5(11)
_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; SHELXTL (Sheldrick, 2008)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'enCIFer (Allen et al., 2004); PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.020
_diffrn_reflns_av_sigmaI/netI    0.019
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7693
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.55
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    7.762
_exptl_absorpt_correction_T_max  0.746
_exptl_absorpt_correction_T_min  0.419
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2001)'
_exptl_crystal_colour            blue-green
_exptl_crystal_density_diffrn    2.032
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.84
_refine_diff_density_min         -0.36
_refine_diff_density_rms         0.09
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.10
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         1914
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.10
_refine_ls_R_factor_all          0.0151
_refine_ls_R_factor_gt           0.0148
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.013P)^2^+5.874P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0360
_refine_ls_wR_factor_ref         0.0361
_reflns_number_gt                1884
_reflns_number_total             1914
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c4dt00909f1.cif
_cod_data_source_block           6
_cod_depositor_comments
'Adding full bibliography for 7030374--7030380.cif.'
_cod_original_cell_volume        2168.6(7)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7030378