A [ 2. H _2 O _2/ OH ^-] 1. BH _3 THF CH _3 C CH [ H _2 SO _4] HgSO _4 B. Identify A and B.

JEE Main Chemistry question

. Identify and .

(A)CHCHO, CHCOCH
(B)CHCHCHO, CHCOCHCorrect
(C)CHCHCHO, CHCHCOCHCH
(D)HCHO, CHCOCH

Answer: (B)

Solution

Anti-Markovnikov hydroboration–oxidation of the terminal alkyne propyne places boron (and ultimately OH, via the enol) on the terminal carbon, giving propanal, CHCHCHO (), after

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Question ID VK-142442