Crystal structures and magnetic properties of Ni-bisdithiolene complexes with decamethylmetallocenium cations
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- 作者：Christophe Faulmann ; Sté ; phane Dorbes ; Eric Riviè ; re ; Audrey Andase ; Patrick Cassoux and Lydie Valade
- 关键词：Bisdithiolene ; Metallocenium ; Ferromagnetism ; X-ray crystal structures ; dmit
- 刊名：Inorganica Chimica Acta
- 出版年：2006
- 出版时间：1 October 2006
- 年：2006
- 卷：359
- 期：13
- 页码：4317-4325
- 全文大小：726 K
文摘
Three new compounds of formula (1), (2), and (3) have been synthesised, and structurally and magnetically characterised (dmit2− = 1,3-dithiol-2-thione-4,5-dithiolato; dmid2− = 1,3-dithiol-2-one-4,5-dithiolato). Their structural features and magnetic behaviours are compared with those of and . The result of this is that the interactions between the Ni(dmit)2 units in 1 are of ferromagnetic-type, as suggested previously for . The change from acetonitrile to acetone when going from to 2 results in stronger ferromagnetic intermolecular interactions. This better cooperativity is due to a significant increase of the number of contacts between the various moieties within the . On the contrary, the inclusion of larger solvents such as benzonitrile in this type of complexes results in a totally different structural arrangement, which leads to an antiferromagnetic behaviour for 3.