First slide

Alkynes

Question

The compound A of the following reaction is?

Difficult

A

2–(4–nitrophenyl)–1–phenyl ethan–2–one
B

1–(4–nitrophenyl)–2–phenyl ethan–1–one
C

2–(4–nitrophenyl)–1–phenyl ethan–1–one
D

1–(4–nitrophenyl)–2–phenyl ethan–2–one

Solution

[Step 1]: 1–nitro–4–(phenylethynyl)benzene on hydration will give the keto product 2–(4–nitrophenyl)–1–phenyl ethan–1–one based on the stability of the carbanion.

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