Chapter 22.7, Problem 13P

Interpretation Introduction

Interpretation: The result of ${}^{18}O$ labelled water hydrolysis of aspirin when the ortho-carboxy substituent acts as an intramolecular general-base catalyst and as an intramolecular nucleophilic catalyst has to be given.

Concept introduction:

Catalyst: Substance which helps in increasing the rate of a particular reaction without getting consumed in the reaction.

Intramolecular catalysis: A catalysis where catalyst is a part of the molecule that undergoes the reaction promotes the reaction in a species.

Intramolecular nucleophilic catalysis: A catalysis where catalyst is a part of the molecule that undergoes the reaction promotes the reaction in a species by acting as a nucleophile.

Intramolecular general-base catalysis: A catalysis where catalyst is a part of the molecule that undergoes the reaction promotes the reaction in a species by completely removing a proton during the slow step in a reaction.