'Pincer' dicarbene complexes of some early transition metals and uranium.
Pugh, David; Wright, Joseph A.; Freeman, Sandra; Danopoulos, Andreas A.; Dalton transactions (Cambridge, England : 2003)  (2006) 775–782; doi:10.1039/b512133g

data_7006596
_publ_section_title
;
 'Pincer' dicarbene complexes of some early transition metals and
 uranium.
;
_journal_issue                   6
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              775
_journal_page_last               782
_journal_paper_doi               10.1039/b512133g
_journal_year                    2006
_chemical_formula_moiety         'C82 H106 Br4 Cl0 Cr2 N10 O3'
_chemical_formula_sum            'C82 H106 Br4 Cl0 Cr2 N10 O3'
_chemical_formula_weight         1703.41
_chemical_name_systematic
;
?
;
_space_group_IT_number           148
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_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                120.00
_cell_formula_units_Z            18
_cell_length_a                   34.5630(7)
_cell_length_b                   34.5630(7)
_cell_length_c                   41.0813(15)
_cell_measurement_reflns_used    16012
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      24.7
_cell_measurement_theta_min      3.0
_cell_volume                     42501(2)
_computing_cell_refinement       'Scalepack (Otwinowski and Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'Denzo.a Scalepack (Otwinowski and Minor 1997)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius KappaCCD Area Detector'
_diffrn_measurement_method       'Phi and Omega scans to fill Ewald Sphere'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1702
_diffrn_reflns_av_sigmaI/netI    0.1797
_diffrn_reflns_limit_h_max       36
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -40
_diffrn_reflns_limit_l_max       48
_diffrn_reflns_limit_l_min       -48
_diffrn_reflns_number            82975
_diffrn_reflns_theta_full        24.69
_diffrn_reflns_theta_max         24.69
_diffrn_reflns_theta_min         2.98
_exptl_absorpt_coefficient_mu    1.968
_exptl_absorpt_correction_T_max  0.9254
_exptl_absorpt_correction_T_min  0.6943
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   Sortav
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.198
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             15840
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.669
_refine_diff_density_min         -0.556
_refine_diff_density_rms         0.122
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     885
_refine_ls_number_reflns         15994
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.2029
_refine_ls_R_factor_gt           0.0998
_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^)+(0.0827P)^2^+763.8233P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1998
_refine_ls_wR_factor_ref         0.2395
_reflns_number_gt                8432
_reflns_number_total             15994
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b512133g.txt
_cod_data_source_block           2b
_cod_original_sg_symbol_H-M      'R -3'
_cod_database_code               7006596