Which of the following molecules or ions should exhibit resonance?

Question

Quizplus · Accepted Answer

The molecule COS has a structure where the central carbon is double bonded to oxygen and singly bonded to sulfur. The sulfur atom also has a lone pair of electrons. The double bond can resonate between the carbon and oxygen atoms, resulting in the three resonance structures shown below:

C=O/S=S  (Structure 1)

C≡O^+/S^-  (Structure 2)

C^-/O^+=S  (Structure 3)

Therefore, choice C should exhibit resonance.

Which of the Following Molecules or Ions Should Exhibit Resonance