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JEE Main levelSingle correct optionDifficulty 2 of 3co006

Benzaldehyde is treated with the ylide $(C X_{6} H X_{5}) X_{3} P = CHCH X_{3}$ . The products are

A1-phenylpropan-2-ol and $(C X_{6} H X_{5}) X_{3} P = O$
B1-phenylpropan-1-ol and $(C X_{6} H X_{5}) X_{3} P$
Cbenzyl alcohol and $(C X_{6} H X_{5}) X_{3} P = CH X_{2}$
Dprop-1-en-1-ylbenzene and $(C X_{6} H X_{5}) X_{3} P = O$

Answer: D

The Wittig reaction joins the carbonyl carbon and the ylide carbon by a

C = C

bond, forming

C X_{6} H X_{5} CH = CHCH X_{3}

. The oxygen goes onto phosphorus as triphenylphosphine oxide, which drives the reaction.

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