Why trans is more stable than cis

an alkene can have cis-trans isomers only when each C in the double bond is disubstituted > monosubstituted; trans typically more stable than cis. The IPCM model gave a reverse stability order, where the Cis isomer is kcal mol-1 more stable than Trans. These IPCM results are in accordance with the. In cyclic alkenes, the cis isomer is generally more stable than the trans. The trans isomer is rarely observed unless the ring contains 10 or more carbons.