THE ROLE OF DEGENERATE STATES IN CHEMISTRY

By PATRICIA PEREZ

CONTENTS EARLY PERSPECTIVES ON GEOMETRIC PHASE NON-ADIABATIC EFFECTS IN CHEMICAL REACTIONS: EXTENDED BORN–OPPENHEIMER EQUATIONS AND ITS APPLICATIONS COMPLEX STATES OF SIMPLE MOLECULAR SYSTEMS QUANTUM REACTION DYNAMICS FOR MULTIPLE ELECTRONIC STATES ELECTRON NUCLEAR DYNAMICS ¨ APPLYING DIRECT MOLECULAR DYNAMICS TO NON-ADIABATIC SYSTEMS CONICAL INTERSECTIONS IN MOLECULAR PHOTOCHEMISTRY: THE PHASE-CHANGE APPROACH THE CRUDE BORN–OPPENHEIMER ADIABATIC APPROXIMATION OF MOLECULAR POTENTIAL ENERGIES CONICAL INTERSECTIONS AND THE SPIN–ORBIT INTERACTION