1. Contribution from the Department of Chemistry, University of Miami, Coral Gables, Florida, 33126, Department of Organic Chemistry, University of Pannonia, Veszprém, Hungary, The Institute for Chemical Physics, Beijing Institute of Technology, Beijing, 100081 People's Republic of China, Department of Chemistry and Center for Computational Chemistry, University of Georgia, Athens, Georgia 30606, and Department of Biological, Chemical and Physical Sciences, Roosevelt University, Chicago, Illinois 60605