Interplay between an elusive 4-(isopropylamino)imidazol-2-ylidene and its isolable mesoionic tautomer, and associated reactivities
Vincent Cesar; Jean-Christophe Tourneux; Nadia Vujkovic; Remy Brousses; Noel Lugan; Guy Lavigne; Chem. Commun. 48 (2012) 2349–; doi:10.1039/c2cc17870b

data_7107395
_publ_section_title
;
 Interplay between an elusive 4-(isopropylamino)imidazol-2-ylidene and its
 isolable mesoionic tautomer, and associated reactivities
;
_journal_name_full               'Chem. Commun.'
_journal_page_first              2349
_journal_paper_doi               10.1039/c2cc17870b
_journal_volume                  48
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C24 H32 N3, C F3 O3 S'
_chemical_formula_sum            'C25 H32 F3 N3 O3 S'
_chemical_formula_weight         511.6
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_H-M_alt        'P n a 21'
_symmetry_Int_Tables_number      33
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2010-08-03T14:01:05-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                90.0
_cell_formula_units_Z            4
_cell_length_a                   15.974(5)
_cell_length_b                   13.378(5)
_cell_length_c                   12.495(5)
_cell_measurement_reflns_used    9999
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      36.29
_cell_measurement_theta_min      2.57
_cell_measurement_wavelength     0.71073
_cell_volume                     2670.2(17)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.025
_diffrn_reflns_av_unetI/netI     0.0126
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            58595
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.57
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.172
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.862
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
'SADABS, Sheldrick, Bruker, 2000'
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.273
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1080
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.283
_refine_diff_density_min         -0.321
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.03(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     327
_refine_ls_number_reflns         5443
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0348
_refine_ls_R_factor_gt           0.0323
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0804P)^2^+0.2173P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0951
_refine_ls_wR_factor_ref         0.0999
_reflns_number_gt                5206
_reflns_number_total             5443
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c2cc17870b.txt
_cod_data_source_block           compound_3
_cod_database_code               7107395