Research Interests: Research in Dr. Alexander's group focuses on the theoretical study of molecular collisions, particularly those involving free radicals, the photofragmentation of small molecules, and the structure and energetics of weakly bound complexes involving open-shell species. Our interest is the coupling of the vibrational and rotational motion of the nuclei with the spin and orbital motion of the electrons. Within the past several years we have developed new codes to treat, fully quantum mechanically, both insertion and abstraction reactions involving multiple electronic potential energy surfaces.