The First Structurally Characterized Mn(III) Substituted Sandwich-type Polyoxotungstates |
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| Authors: | Daniel Drewes Markus Piepenbrink Bernt Krebs |
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| Institution: | 1. Institut für Anorganische und Analytische Chemie, Westf?lische Wilhelms-Universit?t, Corrensstra?e 36, D-48149, Münster, Germany
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| Abstract: | The new polyoxotungstates
![$$((\hbox{CH}_{3})_{4}\hbox{N})_{2}\hbox{Na}_{7}(\hbox{Mn}^{{\rm III}}(\hbox{H}_{2}\hbox{O}))_{3}(\hbox{SbW}_{9}\hbox{O}_{33})_{2}]\cdot 24.5$$](/content/d65163345h238820/10876_2006_59_Article_IEq1.gif) H2O (1),
![$$\hbox{Na}_{8.25}(\hbox{Mn}^{\rm III}(\hbox{H}_{2}\hbox{O}))_{2.25}(\hbox{WO}(\hbox{H}_{2}\hbox{O}))_{0.75} (\hbox{AsW}_{9}\hbox{O}_{33})_{2}]$$](/content/d65163345h238820/10876_2006_59_Article_IEq3.gif) · 28H2O (2) and
![$$\hbox{Na}_{3}\hbox{K}_{9}\hbox{Mn}^{\rm II}(\hbox{H}_{2}\hbox{O})\hbox{Mn}_{2}(\hbox{AsW}_{9}\hbox{O}_{33})_{2}]\ \cdot 16$$](/content/d65163345h238820/10876_2006_59_Article_IEq4.gif) H2O (3) were synthesized in aqueous solution and characterized by IR and Raman spectroscopy, energy dispersive X-ray fluorescence and single-crystal X-ray analysis. The anions in 1 and 2 are the first structurally characterized sandwich-type polyoxoanions which contain trivalent manganese atoms. The manganese atoms are coordinated by four oxygen atoms of two
 Keggin fragments and one water molecule, forming a square pyramid. The manganese(II) containing anions in 3 are linked via Mn–O–W-bonds, forming a two-dimensional network.Dedicated to Prof. M.T. Pope on the occasion of his retirement. |
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| Keywords: | Heteropolytungstates manganese polyoxometalates tungsten |
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