Abstracts 2003

Abstract of Publication No. 467

Rebecca H. Laye, Mark Murrie, Stefan Ochsenbein, Aidan R. Bell, Simon J. Teat, James Raftery, Hans-Ulrich Güdel and Eric J. L. McInnes
Solvothermal Syntheses of High-Nuclearity Vanadium(III) Clusters
Chem. Eur. J. 9, 6215-6220 (2003)      Full Text (PDF)      DOI-Link     

Abstract: Superheating alcohol solutions of simple trimetallic vanadium(III) precursors gives the octa- and decametallic vanadium(III) clusters [V8(OEt)8(OH)4(O2CPh)12] (1) and [V10(OMe)20(O2CMe)10] (2). Cluster 2 is the largest vanadium(III) cluster synthesised to date. Thus solvothermal synthetic techniques are an excellent route to high-nuclearity vanadium(III) clusters. Both 1 and 2 consist of a planar or near-planar array of VIII ions. The metal ions in 1 are bridged by either a m2-hydroxide and two m2-benzoate groups or two m2-ethoxides and a m2-benzoate groups, the two bridging arrangements alternating around the ring. In 2 each pair of neighbouring metal ions is bridged by two m2-methoxides and a m2-acetate, and this molecule is the VIII analogue of Lippard's famous "ferric wheel". Preliminary magnetic susceptibility studies show the exchange coupling in both complexes to be antiferromagnetic in nature, with the coupling stronger in 1 than in 2.

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