Enthalpy, entropy, and free-energy changes in the equilibration of cis-and trans-ethyl 3-t-butylcyclobutanecarboxylate and 3-t-butyl-cyclobutanol

GM Lampman, GD Hager…

Index: Lampman,G.M. et al. Journal of Organic Chemistry, 1970 , vol. 35, # 7 p. 2398 - 2402

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Citation Number: 6

Abstract

The cis-and trans-3-t-butylcyclobutanols have been prepared and equilibrated with aluminum isopropoxide in isopropyl alcohol at different temperatures. The thermodynamic parameters (trans to cis) are AH=-1.6 kcal/mol, AS=-1.1 cal/(deg mol), and AGloo=-1.15 kcal/mol. The equilibration of ethyl 3-t-butylcyclobutanecarboxylate with sodium ethoxide in ethanol at different temperatures gives AH=-0.8 kcal/mol, AS=-0.7 cal/(deg mol), and ...