1. Department of Chemistry, Kent State University, Kent, Ohio 44242 (K.W.S.); Department of Chemistry, University of North Texas, Denton, Texas 76203-5068 (W.E.A.); Chevron Research Company, Richmond, California 94802-0627 (J.C.F.); and Department of Chemistry, Wayne State University, Detroit, Michigan 48202 (C.F.P. and P.H.S.)