Heterogeneous catalysis in solution. Part 14.—Kinetics of isotopic exchange reactions in two immiscible phases with rapid exchange across the interface

Abstract

An analysis has been made of the kinetics of an isotopic exchange reaction taking place in two immiscible phases, with rapid interphase exchange. The overall process can be followed by sampling one phase only. The resulting rate equation resembles the McKay relation for a single phase, with the rate replaced by the sum of the volume-weighted rates in the two phases, and the concentrations of the reagents by the sums of their volume-weighted concentrations. Heterogeneous catalysis fits into this scheme if the surface layer is treated as one of the phases. The theory has been applied to systems studied in the literature.