1. Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, Department of Earth and Planetary Science, University of California, Berkeley, California 94720, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan, Department of Chemistry, National Taiwan University, Taipei, Taiwan, Department of Chemistry, University of New Mexico, Albuquerque, New Mexico 87131, and Chemical Research Center, Hungarian Academy of Sciences, Budapest, Hungary