Manganese(II) Oxazolidine Nitroxide Chelates: Structure, Magnetism, and Redox Properties

Ian A. Gass, Mousa Asadi, David W. Lupton, Boujemaa Moubaraki, Alan M. Bond, Si-Xuan Guo, Keith S. Murray

Research output: Contribution to journalArticle

Abstract

The mononuclear oxazolidine nitroxide complex [Mn II(L)2](ClO4)2 (1) (L ,4-dimethyl-2,2-di(2-pyridyl)oxazolidine N-oxide) has been synthesized and investigated using single-crystal X-ray diffraction, variable-temperature magnetic susceptibility measurements, and electrochemistry. The structural analysis reveals bond lengths compatible with a linear L –MnII–L arrangement where the ligands are in the neutral ligand form and the central MnII ion is high spin (S = 5/2). Although analysis of the variable-temperature magnetic susceptibility data suggests a strong antiferromagnetic metal– radical interaction, the radical–radical intramolecular interaction could not be determined unambiguously from such fits. The resultant isolated S = 3/2 ground state is confirmed by low-temperature magnetization versus field measurements. Electrochemical studies reveal similar square schemes and redox intermediates to the previously reported analogues [FeII(L)2][BF4]2 and [CoII(L )2][NO3]2.
Original languageEnglish
Pages (from-to)1618-1624
Number of pages7
JournalAustralian Journal of Chemistry
Volume67
Issue number11
Publication statusPublished - 15 Sep 2014

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    Gass, I. A., Asadi, M., Lupton, D. W., Moubaraki, B., Bond, A. M., Guo, S-X., & Murray, K. S. (2014). Manganese(II) Oxazolidine Nitroxide Chelates: Structure, Magnetism, and Redox Properties. Australian Journal of Chemistry, 67(11), 1618-1624.