Which of the following isn't a resonance hybrid?

Question

Quizplus · Accepted Answer

A resonance hybrid is a representation of a molecule where the electron structure is delocalized across several atoms, typically shown with dashed lines to indicate partial bonds or electron pairs. The given chemical formulas do not directly indicate resonance structures; however, the context suggests examining the nature of the molecules. COS (carbon monoxide sulfide), unlike the others, does not typically exhibit resonance. Molecules like nitrite (NO2-), nitrosyl chloride (NOCl), sulfur dioxide (SO2), and thiocyanate ion (SCN-) are known to have resonance structures due to the delocalization of electrons among the atoms, which is not a characteristic feature of COS.

Which of the Following Isn't a Resonance Hybrid