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Dalton Trans., 2012,41, 10000-10005
19 Mar 2012,
16 Jul 2012
First published online
16 Jul 2012
New polyoxometalate ‘sandwiches’ have been formed where two [P2W15O56]12− lacunary Dawson clusters encapsulate two transition metal ions to give clusters with the general formula [MII2(P2W15O56)2]20− (where M = Mn, Co, and Ni respectively), [FeIII2(P2W15O56)2]18−, and [CuII4(P2W15O56)2]16−. The Mn, Co, and Ni clusters exhibit a hitherto unseen αββα isomeric geometry and all five compounds are associated with tetrabutylammonium cations which allow for their dissolution in non-aqueous solvent.
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