ln(k2/T) = ln(kB /h) + .S./ R – .H. /RT (3)
was found to follow a straight line with a correlation coefficient better than 0.98. The free energy of activation .G# was calculated from the relation .G# = .H# - T.S#.
Acknowledgements
The authors are grateful to the Ministry of Education, Science and Sport of the Republic of Slovenia for financial support (Contract number: PO 0545-0106).
References and Notes
1. (a) Lal, G.S; Pez, G.P.; Syvret, R.G. Chem. Rev. 1996, 96, 1737. (b) Taylor, S.D.; Kotoris, C.C.; Hum, G. Tetrahedron 1999, 55, 12431. (c) Furin, G.G.; Fainzilberg, A.A. Russian Chem. Rev. 1999, 68, 653. 2. (a) Baasner, B.; Hagemann, H.; Tatlow, J.C.; Eds.; Methods of Organic Chemistry (Houben- Weyl) Vol. E 10a and 10b: Organofluorine Compounds; Thieme: New York, 1999. (b) Hudlicky, M., Pavlath, A.E., Eds.; Chemistry of Organic Fluorine Compounds II. A Critical Review. ACS Monograph 187. ACS: Washington DC, 1995. (c) Hiyama T. Organofluorine Compounds. Chemistry and Applications; Springer-Verlag: Berlin, 2000. 3. (a) Banks, R.E.; Mohialdin-Khaffaf, S.N.; Lal, S.G.; Sharif, I.; Syvret, R.G. J. Chem. Soc., Chem. Commun. 1992, 595. (b) Stavber, S.; Zupan, M.; Poss, A.J.; Shia, G.A. Tetrahedron Lett. 1995, 36, 6769. (c) Umemoto, T.; Nagayoshi, M. Bull. Chem. Soc. Jpn. 1996, 69, 2287. 4. (a) Gilicinski, A.G.; Pez, G.P.; Syvret, R.G.; Lal, G.S. J. Fluorine Chem. 1992, 59, 157. (b) Differding, E.; Bersier, P.M. Tetrahedron 1992, 48, 1595. 5. Girina, G.P.; Faizil'berg, A.A.; Feoktistov, L.G. Russ. J. Electrochem. 2000, 36, 162. 6. (a) Zupan, M.; Iskra, J.; Stavber, S. Bull. Chem. Soc. Jpn. 1995, 68, 1655. (b) Stavber, S.; Zupan, M. Synlett 1996, 693. (c) Stavber, S.; Jereb, M.; Zupan, M. Synlett 1999, 1375. (d) Stavber, S.; Jereb, M.; Zupan, M. ARKIVOC 2001, (v), 98. (e) Stavber, S.; Jereb, M.; Zupan, M. J. Phys. Org. Chem. 2002, 15, 56. 7. Mills, W.H.; Nixon, I.G. J. Chem. Soc. 1930, 2510. 8. (a) Nilsson, J.L.G.; Selander, H.; Sievertsson, H.; Skanberg, I.; Svensson, K.G. Acta Chim. Scand. 1971, 25, 94. (b) Tee, O. S.; Iyegar, N.R.; Bennett, J.M. J. Org. Chem. 1986, 51, 2585. 9. (a) Bergquist, K.E.; Nilsson, A.; Ronlan, A. Acta Chim. Scand. 1982, 36, 675. (b) Nilsson, A.; Ronlan, A.; Parker, V.D. Tetrahedron Lett. 1975, 16,1107. (c) Ferron, B.; Jacquesy, J.C.; Jouannetaud, M.P.; Karam, O.; Coustard, J.M. Tetrahedron Lett. 1993, 34, 2949.
