Which of the following pairs are not resonati | vedclass

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Question

(C) Resonating structures must have the same number of unpaired electrons and the same total charge.In option $C$,the structure $CH_2 = CH - CH = CH_2

Vedclass · Accepted Answer

$CH_2 = CH - CH = CH_2 \leftrightarrow \dot{C}H_2 - CH = CH - \dot{C}H_2$

Vedclass · Answer

(C) Resonating structures must have the same number of unpaired electrons and the same total charge.In option $C$,the structure $CH_2 = CH - CH = CH_2$ has zero unpaired electrons (all electrons are paired in bonds).The structure $\dot{C}H_2 - CH = CH - \dot{C}H_2$ is a diradical,meaning it has two unpaired electrons.Since the number of unpaired electrons is not conserved,these are not valid resonating structures.

Which of the following pairs are not resonating structures?

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