ROBERT H. CRABTREE, PhD, is a professor in the Department of Chemistry at Yale University. He has served on the editorial boards of Chemical Reviews, New Journal of Chemistry, Journal of Molecular Catalysis, and Organometallics and has received numerous awards for his research accomplishments including the Organometallic Chemistry Prize of Royal Society of Chemistry (1991) and the Organometallic Chemistry Prize of the American Chemical Society (1993).