1. Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen‐Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany, Fax: +49‐9131‐8527387
2. Department of Bio‐Chemical and Medicinal Sciences, The State University of Novi Pazar, Vuka Karadžića bb, 36300 Novi Pazar, Serbia
3. Department of Chemistry, Faculty of Science, University of Cairo, Cairo, Egypt
4. Computer Chemistry Center, University of Erlangen‐Nürnberg, Nägelsbachstr. 25, 91052 Erlangen, Germany
5. Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujuvac, Serbia