Enthalpies of formation of cis- and trans-1,2-diethylcyclopropane and cis- and trans-bicyclo[6.1.0]nonane. Structural effects on energies of cyclopropane rings
作者:Kenneth B. Wiberg、Elmer C. Lupton、David J. Wasserman、Armin De Meijere、Steven R. Kass
DOI:10.1021/ja00318a032
日期:1984.3
enthalpies of formation of cis- and trans-1,2-diethylcyclopropane were determined by oxygen bomb calimetry. The cis-diethyl isomer was 1.1 kcal/mol less stable than the trans isomer. Alkyl groups were found to stabilize a cyclopropanering by the same amount as for a carbon-carbon double bond. The enthalpies of formation cis- and trans-bicyclo(6.1,0)nonane formation, in contrast to cis- and trans-cyclooctene