COMEDK · Chemistry · 26. Alcohols Phenols and Ethers

In Friedal-Crafts alkylation reaction of phenol with chloromethane, the product formed will be

A \(o\)-cresol only
B \(m\)-cresol only
C mixture of \(o\)-and \(p\)-cresol
D \(p\)-cresol only

Verified Solution

Answer & Solution

Correct Answer

(C) mixture of \(o\)-and \(p\)-cresol

Step-by-step Solution

Detailed explanation

Phenol is an electron-rich aromatic compound due to the presence of the hydroxyl group, which is strongly activating and ortho/para-directing. Friedel-Crafts alkylation involves the reaction of an aromatic ring with an alkyl halide in the presence of a Lewis acid catalyst like…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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