title: Influence of the dielectric medium on the carbonyl infrared absorption peak of acetylferrocene.
abstract: The solvent effect on the position of the carbonyl vibrational stretching of acetylferrocene in aprotic media was studied in this work. The solvent-induced shifts in this organometallic compound were interpreted in terms of the alternative reaction field model(SCRF-MO) proposed by Kolling. In contrast to the established trends for carbonyl groups in organic systems, the results suggest that the continuum models for the reaction field are not adequate and that the influence of dipolarity-polarizability described by an inhomogeneous coupling function theta(epsilon )L(n(2)) that assumes optical dielectric saturation is responsible for the carbonyl band shift and, there is empirical evidence that the effect of field-induced intermolecular interaction on band shift, interpreted in terms of the van der Waals forces from the solvent, have a important contribution to this phenomena.
authors.affiliation: Laboratorio de Electrónica Molecular, Departamento de Química, Facultad Experimental de Ciencias, La Universidad del Zulia, Venezuela . yalvarado@hotmail.com
authors.forename: Ysaías J
authors.initials: YJ
authors.lastname: Alvarado
authors.forename: José Lucas
authors.initials: JL
authors.lastname: Peña-Suárez
authors.forename: Néstor
authors.initials: N
authors.lastname: Cubillán
authors.forename: Paola H
authors.initials: PH
authors.lastname: Labarca
authors.forename: José A
authors.initials: JA
authors.lastname: Caldera-Luzardo
authors.forename: Francisco
authors.initials: F
authors.lastname: López-Linares
mesh_terms: D000042:Absorption / Q000187:drug effects; D002244:Carbon / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D000075163:Metallocenes; D008956:Models, Chemical; D012997:Solvents / Q000737:chemistry* / Q000494:pharmacology*; D013055:Spectrophotometry, Infrared
chemical_list: D005296:Ferrous Compounds; D000075163:Metallocenes; D012997:Solvents; C053522:1-acetylferrocene; D002244:Carbon; C004998:ferrocene