A Stable Anionic N-Heterocyclic Carbene and Its Zwitterionic Complexes
Vincent César; Noël Lugan; Guy Lavigne; Journal of the American Chemical Society 130 (2008) 11286–11287; doi:10.1021/ja804296t

data_4108253
_publ_contact_author             'Lugan, N.'
_publ_contact_author_email       lugan@lcc-toulouse.fr
_publ_section_title
;
 A Stable Anionic N-Heterocyclic Carbene and Its Zwitterionic Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11286
_journal_page_last               11287
_journal_paper_doi               10.1021/ja804296t
_journal_volume                  130
_journal_year                    2008
_chemical_formula_moiety         'C44 H46 Ag N2 O2 P'
_chemical_formula_sum            'C44 H46 Ag N2 O2 P'
_chemical_formula_weight         773.67
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2008-07-22T09:50:02-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.3816(16)
_cell_length_b                   15.909(2)
_cell_length_c                   21.281(3)
_cell_measurement_reflns_used    9999
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      26.37
_cell_measurement_theta_min      2.03
_cell_measurement_wavelength     0.71073
_cell_volume                     3853.3(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      93(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker APEX II'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0652
_diffrn_reflns_av_sigmaI/netI    0.0196
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            97617
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         5.11
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.603
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.925
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 R.H. Blessing, Acta Cryst. (1995), A51, 33-38
;
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.334
_exptl_crystal_description       needle
_exptl_crystal_F_000             1608
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.730
_refine_diff_density_min         -2.081
_refine_diff_density_rms         0.119
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.228
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         4036
_refine_ls_number_restraints     65
_refine_ls_restrained_S_all      1.231
_refine_ls_R_factor_all          0.0730
_refine_ls_R_factor_gt           0.0642
_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^)+(0.0001P)^2^+28.9874P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1503
_refine_ls_wR_factor_ref         0.1556
_reflns_number_gt                3546
_reflns_number_total             4036
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja804296t-file007.cif
_cod_data_source_block           complex_4a
_cod_database_code               4108253