Abstract
Two 3-amino-1,2,4-triazole (Hatz)-based magnetic complexes, {[Mn3(H2O)2(Hatz)2(sip)2]·2H2O}n (1) and {[Mn(H2O)3(Hatz)(bda)]·H2O}n (2) (sip3− = 5-sulfoisophthalate and bda2− = trans-butenedioate), were respectively prepared by varying dicarboxylate-containing coligands, and were structurally and magnetically characterized. Structural determinations reveal that 1 exhibits a two-dimensional layered structure with linear {Mn3(μ-N1,N2-Hatz)2}6+ subunits extended by tritopic sip3− connectors. By contrast, 2 is an infinite zigzag chain constructed from octahedral Mn(II) ions and μ-N1,N4-Hatz linkers. Magnetically, typically antiferromagnetic interaction observed in the local MnII3 subunit of 1 mediated by mixed μ-syn, syn-COO− and μ-N1,N2-Hatz heterobridges is slightly stronger than that of 2 transmitted by single μ-N1,N4-Hatz mediator.
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