Answer :
Final answer:
The Esther is PhCH2COOH (Phenylacetic acid) - This ester has a two-carbon chain required for the target alcohol. Grignard reagent: Not required (Target molecule is already an alcohol) The answer is option (c).
Explanation:
Here's the breakdown for each option:
(a) PhMgBr (phenylmagnesium bromide)
- Reacting with PhMgBr would lead to a secondary alcohol after hydrolysis due to the carbonyl group (C=O) in the ester being converted.
- However, the target molecule in option (c) is a primary alcohol. So, option (a) is not suitable.
(b) CH3CH2CH2MgBr (propylmagnesium bromide)
- Using propylmagnesium bromide would create a 4-carbon chain alcohol (Ph-CH2-CH2-CH2-OH).
- This doesn't match the target structure in option (c) which has a 2-carbon chain. Therefore, option (b) is not viable.
(c) CH2-CH2-Ph-OH
- This option directly represents the target molecule itself (phenylethanol).
- Since it's already an alcohol, there's no need for a Grignard reagent for its preparation.
Out of the options provided, you won't need a Grignard reagent for option (c)