Two 3-Amino-1,2,4-triazole-based Manganese(II) Complexes Incorporated With Different Dicarboxylate Coligands: Synthesis, Structure, and Magnetism
Abstract
<div><p>Two 3-amino-1,2,4-triazole (Hatz)-based magnetic complexes, {[Mn<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>(Hatz)<sub>2</sub>(sip)<sub>2</sub>]·2H<sub>2</sub>O}<i><sub>n</sub></i> (<b>1</b>) and {[Mn(H<sub>2</sub>O)<sub>3</sub>(Hatz)(bda)]·H<sub>2</sub>O}<i><sub>n</sub></i> (<b>2</b>) (sip<sup>3−</sup> = 5-sulfoisophthalate and bda<sup>2−</sup> = <i>trans</i>-butenedioate), were respectively prepared by varying dicarboxylate-containing coligands, and were structurally and magnetically characterized. Structural determinations reveal that <b>1</b> exhibits a two-dimensional layered structure with linear {Mn<sub>3</sub>(μ-N1,N2-Hatz)<sub>2</sub>}<sup>6+</sup> subunits extended by tritopic sip<sup>3−</sup> connectors. By contrast, <b>2</b> is an infinite <i>zigzag</i> chain constructed from octahedral Mn(II) ions and μ-N1,N4-Hatz linkers. Magnetically, typically antiferromagnetic interaction observed in the local Mn<sup>II</sup><sub>3</sub> subunit of <b>1</b> mediated by mixed μ-<i>syn, syn</i>-COO<sup>−</sup> and μ-N1,N2-Hatz heterobridges is slightly stronger than that of <b>2</b> transmitted by single μ-N1,N4-Hatz mediator.</p></divSimilar works
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