Abstract
The formation of bimetallic Pd(II) and M = Fe(III), Ti(IV), V(V), Co(II), or Cu(II) complexes with the two-vacancy [As2W19O67(H2O)]14− heteropolyanion (HPA) (below referred to as As2W19) has been studied by UV/Vis and IR spectroscopy and differential dissolution. In an aqueous solution at pH 6 and a Pd: M: As2W19 molar ratio of 1: 1: 1, heteropoly complexes (HPC) incorporating two different metals one being Pd(II) are formed. The resulting complexes were precipitated from solution as cesium salts. In the case of Pd(II) and M = Fe(III), Co(II), or Cu(II) ions, the precipitate contained bimetallic HPC [As2W19FePDO67(H2O)2]9− (65.9 wt %), [As2W19CoPdO67(H2O)2]10− (45.6 wt %), and [As2W19CuPdO67(H2O)2]10− (50.7 wt %) mixed with monometallic HPC [As2W19M2O67(H2O)2](14 − 2m)− (As2W19M2). In the case of Pd(II) and Ti(IV) or V(V), bimetallic HPC of a different composition were precipitated, namely, [As2W19Ti2O67(OH x )2 PdO](10 − 2x)− (76.8 wt %) and [As2W19V2O67(OH x )2 PdO](8 − 2x)− (15.0 wt %), where palladium ions are not incorporated in the HPC structure but are attached to the HPC surface, possibly, as hydroxide species. Using M = Pd(II), Ti(IV), V(V) ions and the HPA As2W19 ([M]: [As2W19] = 2 : 1, pH 6), new monometallic HPC, [As2W19Pd2O67(H2O)2]10−, [As2W19Ti2O67(OH x )2](10 − 2x)−, and [As2W19V2O67(OH x )2](8 − 2x)− (x = 0, 1, or 2), were obtained.
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Original Russian Text © L.G. Detusheva, L.I. Kuznetsova, N.I. Kuznetsova, L.S. Dovlitova, A.A. Vlasov, and V.A. Likholobov, 2008, published in Zhurnal Neorganicheskoi Khimii, 2008, Vol. 53, No. 5, pp. 752–757.
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Detusheva, L.G., Kuznetsova, L.I., Kuznetsova, N.I. et al. Bimetallic palladium(II) and iron(III), titanium(IV), vanadium(V), cobalt(II), and copper(II) complexes with the [As2W19O67(H2O)]14− heteropolyanion. Russ. J. Inorg. Chem. 53, 690–695 (2008). https://doi.org/10.1134/S0036023608050057
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DOI: https://doi.org/10.1134/S0036023608050057