Applications of dynamic NMR spectroscopy to the dissociation of chemical bonds in organic, organometallic, and coordination compounds

Abstract

Dynamic NMR spectroscopy was found to be useful in studying the rates of bond dissociation, if the molecule in question meets certain conditions. The examples are dissociation of organic halides, ammonium salts, and coordination compounds involving amine, thioether, or olefin ligands. The entropy of activation is characteristic depending upon the nature of the transition state: it is large positive if ionic character is reduced, and is large negative if ionic character is increased. The kinetic data obtained by various probes are critically examined to show that those examined in this study give satisfactory agreement. © 1989 IUPAC