The electronic structure and EPR properties of the model aromatic benzyl phenyl thioether radical cation [Ph-S-CH(2)-Ph](+center dot) have been assessed and compared to those of the aliphatic analogues. In the most stable conformation spin and charge are almost equally distributed between the sulfur atom and the adjacent phenyl ring. In correspondence of favourable conformations spin and charge transfer from the aryl to the benzyl ring is predicted to occur thus suggesting the possibility of solvent effects on the reactivity distribution. Contrariwise to the aliphatic analogues, the major reaction mode in the chlorofluorocarbon matrix above 77 K is the C-S bond splitting. (C) 2011 Elsevier Ltd. All rights reserved.
Matrix EPR and QM study of a model aromatic thioether radical-cation / D., Dondi; P., Cimino; V., Barone; A., Buttafava; Lanzalunga, Osvaldo; A., Faucitano. - In: TETRAHEDRON LETTERS. - ISSN 0040-4039. - STAMPA. - 52:32(2011), pp. 4097-4102. [10.1016/j.tetlet.2011.05.113]
Matrix EPR and QM study of a model aromatic thioether radical-cation
LANZALUNGA, Osvaldo;
2011
Abstract
The electronic structure and EPR properties of the model aromatic benzyl phenyl thioether radical cation [Ph-S-CH(2)-Ph](+center dot) have been assessed and compared to those of the aliphatic analogues. In the most stable conformation spin and charge are almost equally distributed between the sulfur atom and the adjacent phenyl ring. In correspondence of favourable conformations spin and charge transfer from the aryl to the benzyl ring is predicted to occur thus suggesting the possibility of solvent effects on the reactivity distribution. Contrariwise to the aliphatic analogues, the major reaction mode in the chlorofluorocarbon matrix above 77 K is the C-S bond splitting. (C) 2011 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
