1. Department of Inorganic Chemistry University of Pécs and Szentágothai Research Centre H-7624 Pécs, P.O. Box 266 Hungary
2. Department of Analytical and Inorganic Chemistry University of Szeged, H- 6720 Szeged Dóm tér 7 Hungary
3. MTA-PTE Research Group for Selective Syntheses Ifjúság u. 20. H-7642 Pécs Hungary