title: (1)H- and (13)C-NMR analysis of a series of 1,2-diaryl-1H-4,5-dihydroimidazoles.
abstract: An analysis of the (1)H- and (13)C-NMR spectra of a series of 1,2-diaryl-1H-4,5-dihydroimidazoles and comparisons with 4,5-dihydroimidazoles having different substitution patterns are presented. The influence of different 1-aryl and 2-aryl group substituents on spectroscopic parameters of the heterocyclic ring and on the contributions of possible mesomeric structures in the system was determined. Spectroscopic features are coherent with the presence of two conjugated systems (Ar(1)-N and Ar(2)-C=N) which compete with the delocalization characteristics of the amidine system.
authors.affiliation: Department of Organic Chemistry, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junín 956 (1113), Buenos Aires, Argentina.
authors.forename: Alejandra
authors.initials: A
authors.lastname: Salerno
authors.forename: Isabel A
authors.initials: IA
authors.lastname: Perillo
mesh_terms: D002247:Carbon Isotopes / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D007093:Imidazoles / Q000032:analysis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008954:Models, Biological
chemical_list: D002247:Carbon Isotopes; D007093:Imidazoles; D006859:Hydrogen