Metal-ion assisted catalysis of nucleophilic attack: bifunctional catalysis
Abstract
Zinc-ion catalysis of the hydration of acetaldehyde is markedly increased by co-ordination of a ligand bearing a remote general base; this provide positive confirmation of the hypothesis that the hydration, when co-operatively catalysed by zinc and a base, requires independent attack by base and metal ion, i.e., the base must not be co-ordinated to the metal ion.