What is the important of NaOH in preparation of bromoaniline?

NaOH is important in the preparation of bromoaniline as it is used to deprotonate the aniline molecule, making it more nucleophilic. This allows the bromine atom to substitute for one hydrogen atom on the benzene ring to form bromoaniline. Additionally, NaOH helps to maintain the reaction conditions at a suitable pH for the substitution reaction to occur efficiently.