A unique tetranuclear Mn(II) cluster bridged by carboxyl substituted nitronyl nitroxide radical: Crystal structure and magnetic properties

• Published in: Inorganic chemistry communications Vol. 43; pp. 135 - 137
• Main Authors: Li, Yungai, Guo, Yaowei, Tian, Haixia, Hu, Peng, Sun, Zan, Ma, Yue, Li, Licun, Liao, Daizheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2014
• Subjects: Crown-like ring structure; Magnetic properties; Manganese; Nitronyl nitroxide radical; Crown-like ring structure; Nitronyl nitroxide radical; Manganese; Magnetic properties
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2014.02.029

One unique radical-bridged Mn(II) cluster [Mn4(hfac)6(NIToBA)2(HIMoBAH)(H2O)3] (1) (hfac=hexafluoroacetylacetonate, NIToBAH=2-(2-carboxyphenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-oxide, HIMoBAH=2-(2-carboxyphenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-hydroxy) has been synthesized and structurally and magnetically characterized. The core of complex 1 features four Mn(II) ions bridged by three carboxyl groups and two nitroxide groups to form a crown-like ring structure. This complex exhibits strong antiferromagnetic interaction because the NO groups are directly coordinated to the metal ions. One unique radical-bridged Mn(II) cluster has been synthesized by using carboxyl substituted nitronyl nitroxide radical. This complex exhibits strong antiferromagnetic interaction because the NO groups are directly coordinated to the metal ions. [Display omitted] •One unique radical-bridged Mn(II) cluster.•Four Mn(II) ions form a crown-like ring structure.•The complex exhibits strong antiferromagnetic interaction.