Hydrothermal synthesis and structural characterization of novel α-Keggin unit-supported Cu(II)- and Mn(II)-bipyridine complexes from a tri -lacunary precursor

Author： Chatterjee Rajarshi  

Publisher： Springer Publishing Company

ISSN： 0340-4285

Source： Transition Metal Chemistry, Vol.34, Iss.1, 2009-02, pp. : 1-5

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Abstract

Blue [{Cu(2,2′-bipy)2}2{α-SiW12O40}] (bipy = bipyridyl) (1) and pale yellow [Mn(2,2′-bipy)3]2[α-SiW12O40] (2) have been synthesized hydrothermally and characterized by IR spectroscopy and single crystal X-ray structure analysis. In 1, the [α-SiW12O40]4− ion acts as a bridge between the two [{Cu(2,2′-bipy)2]2+ moieties via coordination through the terminal oxygen atoms, while in 2, the [Mn(2,2′-bipy)3]2+ ion balances the charge on the polyoxo anion without forming any covalent bond. To the best of our knowledge, this is the first example of transition metal-mediated transformation of [α-SiW9O34]10− to [α-SiW12O40]4−.

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