To determine which compounds will yield a secondary alcohol when reacted with a Grignard reagent followed by acid hydrolysis, let's analyze each option.
Understanding Grignard Reactions
Grignard reagents react with carbonyl compounds to form alcohols. The type of alcohol produced depends on the structure of the carbonyl compound.
Analyzing Each Compound
- I. HCHO (Formaldehyde): This is an aldehyde that reacts with Grignard reagents to produce a primary alcohol, not a secondary alcohol.
- II. C₂H₅CHO (Benzaldehyde): This is also an aldehyde. When reacted with a Grignard reagent, it forms a secondary alcohol.
- III. CH₃COCH₃ (Acetone): This is a ketone. It reacts with Grignard reagents to yield a tertiary alcohol.
- IV. RCOOC₂H₅ (Ester): Esters can react with Grignard reagents to form a tertiary alcohol after hydrolysis.
Identifying the Correct Options
From the analysis, only compound II (C₂H₅CHO) produces a secondary alcohol. Compound III (acetone) produces a tertiary alcohol, while compound IV (an ester) also leads to a tertiary alcohol.
Final Answer
The correct option is: A) Only II.
