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Poster session, D30 77Effect of fluorine atom substitutions in benzyl alcohol derivatesLuca Evangelisti 1 , Gang Feng 1 , Qian Gou 1 , Walther Caminati 11 Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Italy,luca.evangelisti6@unibo.itIn recent years, there has been increasing interest in exploiting the unusual properties offluorocarbons to modulate physicochemical properties of molecules. Fluorine atoms areoften introduced in a drug skeleton to modify pharmacokinetics properties.For example, Benzyl alcohol (BA) displays only a skew configuration but its rotationalspectrum resisted for a long time to the assignment because of severe Coriolisinteractions between the four equivalent tunnelling states originated by the equivalent”gauche” conformations. 1 The substitution of the ring hydrogen with fluorine atomsrevealed some interesting effects: (i) the replacement of the ring hydrogens with Fatoms makes different minima not longer equivalent, and a conformational equilibriumis generated. (ii) The potential energy surface is considerable modified, with respect tobenzyl alcohol, depending on the ortho/para or meta fluorine atom substituents. So wedecided to investigate some di-flurinated substitutions molecules (see Figure 1) bymicrowave spectroscopy. 2,3Evangelisti L.Feng G.Gou Q.Caminati W.Fig. 1: Different Fluorinated-benzyl alcohol.References[1] K.A. Utzat, R.K. Bohn, J.A. Montgomery Jr, H.H. Michels, W. Caminati, J. Phys.Chem. A 114, 6913, 2010.[2] L.Evangelisti, L.B. Favero, W. Caminati J. Mol. Struct. 978, 279, 2010.[3] L. Evangelisti, F. Gang. Q. Gou, W. Caminati J. Mol. Struct. 2012,DOI:10.1016/j.molstruc.2012.01.004