ABSTRACT
L. I. MAZALETSKAYA, N. I. SHELUDCHENKO, L. B. DUDNIK and L. N. SHISHKINA
11.1 Introduction .................................................................................. 358 11.2 Experimental Part ........................................................................ 359 11.3 Results and Discussion ................................................................ 361 11.4 Conclusion ................................................................................... 371 Keywords .............................................................................................. 372 References ............................................................................................. 373
11.1 INTRODUCTION
The stoichiometric factors of inhibition and the rate constants of the terpenephenols (TP) with isobornyl and isocamphyl substituents were determined by the reaction with peroxy radicals of ethylbenzene. The reactivity was found to decrease for o-alkoxy compared with o-alkyl substituent caused by the intramolecular hydrogen bond formation that is conformed by FTIR-spectroscopy. The inhibitory activity for mixtures of terpenephenols with 2,6-di-tert-butyl phenols in the initiated oxidation of ethylbenzene was also studied. In spite of the similar antiradical activities of terpenephenols with isobornyl and isocamphyl sunstituents, the reactivity of phenoxyl radicals formed from them are substantially different that is resulted from the kinetic data for mixtures of terpenephenols with sterically hindered phenols.
