1. Department of Inorganic Chemistry, Institute of Chemistry; P.J.Šafárik University; Moyzesova 11 04154 Košice Slovak Republic
2. Department of Organic Chemistry, NMR Laboratory, Institute of Chemistry; P.J.Šafárik University; Moyzesova 11 04154 Košice Slovak Republic
3. Department of Inorganic Chemistry, Faculty of Science; Universita Karlova (Charles University); Hlavova 2030 128 40 Prague Czech Republic