Q.

Carbon-carbon double bond length will be maximum in which of the following compounds ?

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a

CH3CH=CH2

b

CH2=CH2

c

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d

CH3CH=CHCH3

answer is C.

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Detailed Solution

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has highest C - C bond length (B.L.); Because it has maximum hyperconjugation.
More single bond character by hyperconjugation.

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