1. Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487, United States
2. Department of Chemistry, McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
3. Department of Chemistry, University of Missouri, 601 S. College Avenue, Columbia, Missouri 65201, United States
4. 525 Solutions, Inc., P.O. Box 2206, Tuscaloosa, Alabama 35403, United States