KCET · Chemistry · Surface Chemistry

Gabriel phthalimide synthesis is used in thepreparation of primary amine fromphthalimide,
which of the following reagent isnot used during the process?

A \( \mathrm{KOH} \)
B \( \mathrm{NaOH} \)
C \( \mathrm{HCl} \)
D Alkyl Halides

Verified Solution

Answer & Solution

Correct Answer

(C) \( \mathrm{HCl} \)

Step-by-step Solution

Detailed explanation

This reaction is used to prepare primary amines. In this reaction, phthalimide is converted it to potassium salt by heating
with alcoholic \( \mathrm{KOH} \). The salt is then treated with alkyl halide to give \( \mathrm{N} \)-alkyl phthalimide, which on alkaline hydrolysis with
aqueous \( \mathrm{NaOH} \) gives a primary amine as the product.

Phthalimide

Phthalic acid Ethyl amine

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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A. Organ level	p. Pheretima
B Cellular aggregate level	q. Fasciola
C Tissue level	r. Spongilla
D. Organ system level	s. Obelia

Gabriel phthalimide synthesis is used in thepreparation of primary amine fromphthalimide,which of the following reagent isnot used during the process?

Step-by-step Solution

Gabriel phthalimide synthesis is used in thepreparation of primary amine fromphthalimide,
which of the following reagent isnot used during the process?