12.11     Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation.

                   (f)CH_{3}CH=CHCH_{2}

Answers (1)
M manish

The resonating structure of But-2-ene-1-yl carbocation-
The \pi-electrons of C-C double bond shift towards the C-C^+ bond to minimise the deficiency of electron density at CH_2^+. So, this way only one resonant is possible.

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