This award from the Chemistry Research Instrumentation and Facilities Program will assist the Department of Chemistry at University of Colorado in the purchase of a tunable Femtosecond laser system. This equipment will be used in the following areas of research: (1) Mechanism of pericyclic photochemical reactions, (2) structure of gaseous cluster ions, (3) dynamics of photoinduced bond homolysis and heterolysis. A tunable femtosecond laser can provide important information about chemical reactivity. Its use may enable breakthroughs in our understanding of the properties of reactive and of nonreactive molecules. f8 Û-ª þ ; + + Ûª? ÑOh ª' +'ª?0 à + ] $ H l + ¢ ? D h + ++++++++++++++++++++++++++++++++ R:WWUSERTEMPLATENORMAL.DOT