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Cluster and Heterometallic Alkoxide Derivatives of Rhenium and d-Elements of V–VI Groups

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Abstract

The paper represents a listing of results obtained by developing the original methods of controlled synthesis of cluster and mono-, bi- and trimetallic oxo-alkoxide derivatives of rhenium and d-elements of V–VI groups. The developed techniques of the synthesis of metal alkoxides include: (1) anodic dissolution of the metals in the alcohol media; (2) direct reaction of the rhenium (VII) oxide with alkoxide derivatives of the transition elements. By such techniques were obtained: Re4O4(OEt)12, Re4O6(OiPr)10; individual rhenium alkoxocomplexes: Re4O2(OMe)16, Re4O6(OMe)12, Re4O6−y(OMe)12+y; bimetallic ReMoO2(OMe)7, Re4−xMoxO6−y(OMe)12+y, Re4−xWxO6−y(OMe)12+y; Nb2(OMe)8(ReO4)2, Ta2(OMe)8(ReO4)2, Nb4O2(OMe)14(ReO4)2, Ta4O2(OMe)14(ReO4)2, Nb4O2(OEt)14(ReO4)2, Ta4O2(OEt)14(ReO4)2, alkoxocomplexes: Nb2−xTax(OMe)8(ReO4)2, Nb4−xTaxO2(OMe)14(ReO4)2, Nb4−xTaxO2(OEt)14(ReO4)2. All compounds mentioned above are characterized with X-ray single crystal study, IR-spectroscopy, DTG. It has been shown, that thermal decomposition of alkoxide derivatives in inert or hydrogen atmosphere leads to formation nano-size powders of individual rhenium and its alloys at low temperature. Thermal decomposition in air leads to formation individual metal oxides or its solid solutions. It has been demonstrated that the alkoxide derivatives could be promising precursors for next generation catalysts manufacturing.

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Acknowledgements

The research is carried out with the financial support of RFBR (projects Nos. 06-03-32527, 03-03-32750 and 06-03-32444).

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Correspondence to Dmitri V. Drobot.

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Drobot, D.V., Seisenbaeva, G.A., Kessler, V.G. et al. Cluster and Heterometallic Alkoxide Derivatives of Rhenium and d-Elements of V–VI Groups. J Clust Sci 20, 23–36 (2009). https://doi.org/10.1007/s10876-008-0226-1

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  • DOI: https://doi.org/10.1007/s10876-008-0226-1

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