Kinetics of the thermal decompositions of 4-chlorocyclohexene and 3-chlorocyclohexene
Abstract
The gas-phase thermal decompositions of 4-chlorocyclohexene in the temperature range 320–370 °C and of 3-chlorocyclohexene in the range 250–310 °C are homogeneous and unimolecular in a ‘seasoned’ reaction vessel. The rate constants for the elimination of hydrogen chloride are given by the equations k1= 1013·17 ± 0·25 exp –(48,380 ± 700)/RT s–1 and k1= 1011·16 ± 0·22 exp –(36,950 ± 550)/RT s–1 respectively. The double bond when β to the chlorine atom has no effect on the rate of elimination of hydrogen chloride but when α to it increases the rate ca. 100-fold.