Question

Above $(C-N)$ coupling reaction take place at:

• A. low $pH$
• B. nearly nutral $pH$
• C. high $pH$
• D. any $pH$

Answer 1

The correct option is B nearly nutral $pH$

In Diazonium coupling reaction pH of the solution is quite important, it must be mildly acidic or neutral, since no reaction takes place if the pH is too low.