1. Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str...