... Monatshefte für Chemie - Chemical Monthly. ... Pt(dien)H 2 O] 2+ and [PtCl(dien)] + , where dien = diethylentriamine or 1,5-diamino-3-azapentane, with some nitrogen-donor ligands such as 1,2,4-triazole, pyrazole, and pyridazine, were studied in an aqueous 0.10 M NaClO 4 at ...