One-dimensional Schiff-base-bridged manganese(III) complex: Synthesis, crystal structure and magnetic property

Resumo

A new one-dimensional Schiff-base ligand bridged manganese(III) complex with the formula [Mn(acacen)(H₂acacen)]ClO₄ (1) (acacen = N, N'-ethylenebis(acetylacetonylideneaminato) has been obtained from the reaction of [Mn(acacen)(H₂O)₂]ClO₄ with K[Fe(bpdBrb)(CN)₂] (bpdBrb^2– = 1,2-bis(pyridine-2-carboxamido)-4,5-dibromobenzenate), which has been characterized by elemental analysis, IR spectroscopy and X-ray structure determination. Single X-ray diffraction analysis reveals it’s onedimensional infinite structure consisting of alternating units of [Mn(acacen)]⁺ and the Schiff-base ligand H₂acacen with a trans conformation, forming a cationic polymeric chain with free ClO₄^- as the balanced anion. The one-dimensional chain structure can be can be further linked into three-dimensional supramolecular network under the help of the intermolecular weak interactions. Investigation over its magnetic property reveals the weak antiferromagnetic coupling between the adjacent Mn(III) ions.