Which of the following alkenes can have cis and trans isomers?
I. 1-propene
II. 2-butene
III. 3-hexene

Question

Quizplus · Accepted Answer

For an alkene to have cis and trans isomers, it must have different substituents on each end of the double bond. 1-propene cannot have cis and trans isomers because it has a double bond at the end of the chain, leaving no room for isomerism. Both 2-butene and 3-hexene have their double bonds in positions that allow for different substituents on each carbon of the double bond, making cis and trans isomers possible.

Which of the Following Alkenes Can Have Cis and Trans