Curve-Matching Method for Quasi-Unimolecular Reactions

Abstract

A graphical method is presented for evaluating the high‐pressure limiting rate, the low‐pressure limiting rate, and the parabolic exponent from data on quasi‐unimolecular reactions. A logarithmic plot of k₁ against k₂, the apparent first‐order and second‐order rate constants, is matched against a family of theoretical curves. Computations for plotting the theoretical curves are tabulated. The technique is illustrated with data from the literature on cyclopropane and other cyclic molecules, nitrogen pentoxide, and nitrous oxide.