Abstract
The novel tetrapalladium(II)-containing polyoxometalate [Pd(II)4(α-P2W15O56)2](16-) has been prepared in aqueous medium and characterized as its hydrated sodium salt Na16[Pd4(α-P2W15O56)2]·71H2O by single-crystal XRD, elemental analysis, IR, Raman, multinuclear NMR, and UV-vis spectroscopy. The complex exists in anti and syn conformations, which form in a 2:1 ratio, and possesses unique structural characteristics in comparison with known {M4(P2W15)2} species. (31)P and (183)W NMR spectroscopy are consistent with the long-term stability of the both isomers in aqueous solutions.
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