The relative thermodynamic stabilities of 1, 3-cyclohexadiene and 1, 4-cyclohexadiene, together with a number of their alkoxy and other derivatives and some related seven- membered cyclic dienes, have been determined by chemical equilibration in Me2S0 and cyclohexane solution at various temperatures. The values of the thermodynamic parameters AG', AHe, and ASe for the isomerization processes involved are discussed and show ...