Thioester-functionalised and oxime-based hexametallic manganese(iii) single-molecule magnets

Abstract

Two novel hexametallic Mn^III complexes of formulae [Mn₆(μ₃-O)₂(H₂N-sao)₆(3-atpa)₂(EtOH)₆]·2EtOH·2H₂O (1) and [Mn₆(μ₃-O)₂(H₂N-sao)₆(6-atha)₂(EtOH)₆]·6EtOH (2) [H₂N-saoH₂ = salicylamidoxime, 3-hatpa = 3-(acetylthio)propionic acid, 6-hatha = 6-(acetylthio)hexanoic acid] have been synthesised by using thioester-carboxylate ligands and magnetostructurally characterised. 1 crystallises in the triclinic system with space group P and 2 crystallises in the monoclinic system with space group P2₁/c. The study of the dc and ac magnetic susceptibility reveals single-molecule magnet behaviour for both compounds with spin-ground states S = 12 and S = 4 for 1 and 2, respectively. Hence, 1 and 2 are new members of the oxime-based family of [Mn₆] single-molecule magnets, containing the thioester group functionalisation, which could be used to connect devices in molecular spintronics studies.