1. School of Chemical Sciences, University of Illinois, 1209 W. California St., Urbana, Illinois 61801 (A.S., P.W.B.); Department of Chemistry, University of South Carolina, Columbia, South Carolina 29208 (S.R.G.); Department of Chemistry, Wayne State University, Detroit, Michigan 48202 (D.M.C.); and Department of Chemistry, University of Georgia, Athens, Georgia 30602 (J.A.deH.)