In alkenes there are four groups bonded to the carbons which constitute the carbon-carbon double bond. Which of the following situations produces cis-trans isomerism?

Question

Quizplus · Accepted Answer

cis-trans isomerism occurs when the two groups attached to each carbon atom in the double bond are different from each other, which is the case in option B. When all four groups are the same, there is no difference in the orientation around the double bond and no cis-trans isomers exist. When three groups are the same, the fourth group can rotate freely around the carbon-carbon double bond, resulting in only one isomer.

In Alkenes There Are Four Groups Bonded to the Carbons