1. Department of Chemistry; Northwestern University; 2145 Sheridan Road Evanston IL 60208-3113 USA
2. Leidos, Inc., P.O. Box 68; Edgewood Chemical Biological Center; Aberdeen Proving Ground MD 21010 USA
3. Edgewood Chemical Biological Center; US Army Research Development, and Engineering Command; 5183 Blackhawk Rd. Aberdeen Proving Ground MD 21010 USA
4. Department of Chemistry, Faculty of Science; King Abdulaziz University; Jeddah Saudi Arabia