Which of the following are not resonance stru | vedclass

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(A) Resonance structures involve the delocalization of $\pi$-electrons or lone pairs without changing the relative positions of the atomic nuclei.In o

Vedclass · Accepted Answer

$CH_3-N=C=S$ and $CH_3-S-C \equiv N$

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(A) Resonance structures involve the delocalization of $\pi$-electrons or lone pairs without changing the relative positions of the atomic nuclei.In option $(A)$,the $CH_3$ group is attached to the $N$ atom in the first structure and to the $S$ atom in the second structure.Since the connectivity of atoms is different,these are functional isomers,not resonance structures.Options $(B)$,$(C)$,and $(D)$ represent valid resonance structures as they only involve the redistribution of electrons while maintaining the same atomic skeleton.

Which of the following are not resonance structures of each other?

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