The product of the following reaction is P.
The number of hydroxyl groups present in the product P is ______.
The number of hydroxyl groups present in the product P is ______.
Correct Answer: 0
Approach Solution - 1
To determine the number of hydroxyl groups in the product \( P \) of the given reaction, we must analyze the reaction step-by-step.
- The reactant is a benzaldehyde with an additional hydroxyl (-OH) group at the para position.
- The reagent PhMgBr is a Grignard reagent. Grignard reagents add to carbonyl groups (C=O) to form alcohols.
- In the first step, PhMgBr will react with the aldehyde group (CHO) to form a benzyl alcohol. This converts the C=O group of the aldehyde into a C-OH group.
- After the Grignard addition, aqueous NH4Cl is used to protonate the oxygen, stabilizing the alcohol product.
- The starting compound already has one hydroxyl group, and the reaction adds one more hydroxyl group.
Therefore, the total number of hydroxyl groups in the product \( P \) is 2, which falls within the given range of 0,0.
Approach Solution -2
Product benzene has zero hydroxyl group. The reaction leads to formation of a substituted product without hydroxyl groups present.
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