Question

Which of the following would reacts with CH3MgI to give butan-2-ol?

a) Propanal b) Ethanal c) Ethanol d) Propan-2-ol​

Answer 1

Answer:

Propanal reacts with CH3MgI to give Butan-2-ol

Explanation:

Aldehydes react with Grignard reagent (RMgX) to give secondary (2°) alcohols.

RMgX: R = Alkyl group, X = Halogen

Here, R = CH3 and X = I

Propanal + Methyl magnesium iodide = Butan-2-ol

CH3-CH2-CHO + CH3MgI = CH3-CH2-CH(OH)-CH3