Cation-Induced Synthesis of New Polyoxopalladates

Seven polyoxopalladate compounds, [Pd15(SeO3)10(μ3-O)10]10–, with Na+ (1) and K+ (2) as counterions, and Na6[MII{Pd12(SeO3)8(μ4-O)8}]·nH2O (M = Co (3), Zn (4), Ni (5), Cu (6), Mn (7); n = 7–9), have been prepared and characterized by SXRD, FT-IR, UV–vis, EA, TGA, and ESI-MS. These compounds comprise two distinct cluster configurations, {Pd15} and {MIIPd12}, which reveals the possibility of obtaining desired noble metal clusters with a certain nuclearity by using different cations as potential structural directing or template agents in synthesis. All compounds showed apparent absorptions in the visible light region, while 3 and 7 were found to show paramagnetic behavior typical of mononuclear CoII and MnII complexes with zero-field splitting.