1. Department of Inorganic ChemistryUniversity of Pécs and Szentágothai Research Centre H 7624 Pécs, P.O. Box 266 Hungary
2. Department of Organic ChemistryUniversity of Szeged, H- 6720 Szeged Dóm tér 8. Hungary
3. MTA-PTE Research Group for Selective Chemical Syntheses H 7624 Pécs, Ifjúság u. 6. Hungary