The application of frontier molecular orbital theory (HOMO-LUMO interactions) to organic reactions, including thermal and photochemical cycloadditions of pi-systems (including 1,3-dipoles) and rearrangements. Reactions of radicals and carbenes; conformational analysis, stereochemical effects, and methods for the determination of reaction mechanisms. Prerequisite(s): CHEM 3202 and CHEM 3503 (may be taken concurrently).Lectures and seminars three hours a week.