1. Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996-1600 (G.M.M., R.V.S.); and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600 and Transuranium Research Laboratory (Chemistry Division), Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6375 (J.R.P.)