1. Department of Chemistry, University of Dayton, 300 College Park, Dayton, Ohio 45469-2357, USA
2. Department of Chemistry and Biochemistry, The University of Arizona, P.O. Box 210041 1306 East University Boulevard, Tucson, Arizona 85721-0041, USA
3. Department of Chemistry, Murray State University, 1201 Jesse D. Jones Hall, Murray, Kentucky 42071, USA
4. Department of Mathematics, University of Dayton, 300 College Park, Dayton, Ohio 45469-2316, USA