Abstract
Reaction of copper(II) triflate, terbium(III) triflate (5/1 equiv.) with pyrazinehydroxamic acid (H2pyzha) in MeOH solution led to a new heterobimetallic 15-metallacrown-5 complex. In solid state the structure of this complex has been confirmed by X-ray analysis: metallacrown [Tb(H2O)3{Cu(pyzha)}5(H2O)3] (TfO)2·3(H2O)·(MeOH) (TfO = trifluomethanesulfonate). Analysis of the magnetic properties of this complex reveals that in zero dc field it exhibits frequency-dependent out-of-phase signal confirms that it exhibits single-molecule magnet (SMM) behavior.
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