In direct contrast, when benzene diazonium chloride physically couples with an aromatic amine like aniline to yield a yellow azo dye, what is the rigorously required optimal pH environment for the rea

Question

In direct contrast, when benzene diazonium chloride physically couples with an aromatic amine like aniline to yield a yellow azo dye, what is the rigorously required optimal pH environment for the reaction?

Prashant Kotian · Accepted Answer

Correct answer: B. For optimal coupling with aniline, a mildly acidic medium (pH 4-5) is strictly required. This carefully balances preventing the total deactivation of the aniline ring (which would occur in strong acid via massive anilinium ion formation) while actively keeping the diazonium salt heavily concentrated in its highly reactive, electrophilic cationic state.

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