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A Keggin-type Arsenotungstate Anion-supported Transition Metal Complex: Hydrothermal Synthesis and Characterization of

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A Keggin-type Arsenotungstate Anion-supported Transition Metal Complex: Hydrothermal Synthesis and Characterization of

[Fe(2,2

-bipy)

3

]

1.5

[AsW

VI10

W

V2

O

40

Fe(2,2

-bipy)

2

(H

2

O)] · 0.25H

2

O

Ming-Xue Li, Hong-Yu Niu, Wei Wang, and Jing-Ping Wang

Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475001, China

Reprint requests to Prof. J.-P. Wang. E-mail: jpwang@henu.edu.cn Z. Naturforsch.2008,63b,183 – 186; received August 15, 2007

A Keggin-type arsenotungstate anion-supported iron-bipyridine complex, [Fe(2,2-bipy)3]1.5- [AsWVI10WV2O40Fe(2,2-bipy)2(H2O)]·0.25H2O, has been hydrothermally synthesized and char- acterized by IR and ESR spectra, TG-DTA analysis, and single crystal X-ray diffraction. Each structural unit of the title compound consists of one [AsWVI10WV2O40Fe(2,2-bipy)2(H2O)]3−het- eropolyanion, one and a half [Fe(2,2-bipy)3]2+ cations, and a quarter of an H2O molecule. In the heteropolyanion the [Fe(2,2-bipy)2(H2O)]2+unit is covalently bonded to the reduced Keggin poly- oxoanion [AsWVI10WV2O40]5−. The complex is monoclinic, space groupC2/cwitha= 46.8079(13), b= 14.3990(4),c= 26.1085(8) ˚A,β= 90.00(5)◦,Z= 8,Dc= 3.10 g/cm3.

Key words:Keggin-type Anions, Arsenotungstate, Hydrothermal Synthesis

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