Magnetic communication and reactivity of a stable homometallic cation-cation trimer of pentavalent uranyl

The reaction of the UO<inf>2</inf>+ precursor [(UO <inf>2</inf>Py<inf>5</inf>)(KI<inf>2</inf>Py<inf>2</inf>)]<inf>n</inf>, with the potassium salt of the tetradentate aza β-diketiminate ligand L (L = 2-(4-tolyl)-1,3-bis(quinolyl)malondiiminate) affords the first homometallic cation-cation complex of pentavalent uranyl. The complex [UO<inf>2</inf>L] <inf>3</inf> has a new triangular geometry of the cation-cation interaction in the solid state, which gives rise to a clear magnetic interaction with a maximum in the plot of χ versus T at 12 K. It retains its solid state trinuclear structure in solution and is fully stable in organic anaerobic solvents, but reacts rapidly with molecular oxygen to form a rare dinuclear oxo complex of uranyl(vi), ([UO<inf>2</inf>(L)]<inf>2</inf>[μ<inf>2</inf>-O]). © 2012 The Royal Society of Chemistry.


Published in:
Chemical Science, 3, 4, 1075-1079
Year:
2012
ISSN:
2041-6520
Laboratories:




 Record created 2014-11-07, last modified 2018-03-17


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