Carboxylic Acids and their Derivatives - Result Question 7-1
7. The major product of following reaction is
$ R-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{AIH}(i-\mathrm{Bu})_2} \text { ? } $
(2019 Main, 9 Jan I)
(a) RCHO
(b) $\mathrm{RCONH}_2$
(c) RCOOH
(d) $\mathrm{RCH}_2 \mathrm{NH}_2$
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Answer:
Correct Answer: 7. (a)
Solution:
Key Idea: DIBAL-H is diisobutyl aluminium hydride, $\left[\left(\mathrm{CH}_3\right)_2 \mathrm{CHCH}_2\right]_2 \mathrm{AlH}$. It is a selective reducing agent. It reduces carboxylic acids, carboxylic acid derivatives and nitriles into aldehydes. It is an electrophilic reducing agent.
The mechanism of the reaction is as follows:
BETA
