Treatment of primary amines with nitrous acid gives diazonium ions. Aliphatic diazonium ions decompose under the diazotization conditions to give complex mixture of products. Aryldiazonium ions are stable and is a valubale intermediate. They react with activated aromatic compounds to give coupling product.
At what pH phenol reacts with benzene diazonium chloride to give coupling product?
A. pH=2
B. pH=7
C. pH=9
D. pH=14