Which of the bond types shown below gives rise to cis-trans isomers?

Question

Quizplus · Accepted Answer

The bond type shown in choice D, which is a double bond () between sulfur (S) and carbon (C), gives rise to cis-trans isomers. This is because the double bond creates a rigid planar geometry, which prevents rotation around the bond axis. The two different groups attached to each carbon or sulfur atom can either be on the same side (cis) or opposite sides (trans) of the bond plane. The other bond types shown do not have this double bond and therefore cannot lead to cis-trans isomerism.

Which of the Bond Types Shown Below Gives Rise to Cis-Trans