1. Department of Chemistry, Texas A&M University, College Station, Texas 77843, Department of Chemistry, Baylor University, Waco, Texas 76706, Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310-4005, and Department of Chemistry & Biochemistry, Florida State University, Tallahassee, Florida 32306