JEE Main Chemistry question

Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?

(A)The structure with negative charge on the terminal carbon and positive charge stabilized on oxygen
(B)The structure placing positive charge on oxygen with poor charge separation and incomplete octet characterCorrect
(C)The structure with full conjugation and charge delocalized onto the terminal carbon through the diene
(D)The structure retaining the neutral, fully conjugated form

Answer: (B)

Solution

Among the resonance contributors of a conjugated methoxydiene system, the contributor with the least favorable charge placement (e.g., positive charge on the more electronegative

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Question ID VK-139058