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Abstract
Three isostructural heterometallic {FeIII4LnIII2} coordination clusters are reported with genernal formula; [FeIII4LnIII2(μ4-O)2(Hedte)2(piv)6(NO3)2]∙2MeCN∙2CH2Cl2 {Ln = Tb(1), Ho(2) and Er(3), where Hedte = N,N,N,N′--tetrakis-(2-hydroxyethyl)ethylenediamine; piv = pivalic acid}. These clusters are obtained by reacting the FeCl2·4H2O, pivalic acid, Ln(NO3)3·6H2O, and H4edte in MeCN/CH2Cl2. X-ray measurements revealed that 1–3 clusters exhibit a “butterfly” core shape. Solid-state dc-magnetic susceptibility measurement indicates the ferromagnetic interactions in 1 while 2 and 3 demonstrates dominated antiferromagnetic interactions.
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