Trapped Ion Cyclotron Resonance Studies of Ion-Molecule Reactions

Citation

McMahon, Terrance Brian (1974) Trapped Ion Cyclotron Resonance Studies of Ion-Molecule Reactions. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/BJCA-7136. https://resolver.caltech.edu/CaltechETD:etd-01222009-092248

Abstract

Techniques and instrumentation have been developed which permit trapping of ions in the source region of an ion cyclotron resonance cell. These techniques have been used to determined rates of ion-molecule reactions and to observe gas phase ion-molecule equilibria. The rate constants of a number of symmetric charge exchange and proton transfer reactions in simple molecules have been determined and related to theoretical models of ion-molecule reaction. In addition, the role of a symmetric reaction in competition with exothermic reaction channels has been discussed. The rates of symmetric proton and deuteron transfer in a number of simple alkyl alcohols and amines have also been obtained. These reactions have been related to de-excitation mechanisms of excited ions. Gas phase ion-molecule equilibria have been examined to obtain substituent effects on such properties as gas phase basicity, acidity and carbonium ion stabilities. Finally, the ion-molecule reactions of a cyclic ether, trimethylene oxide, have been examined to illustrate the wide range of information available through ion cyclotron resonance experiments.

Thesis Files