Crystal structure of the Ni(II)-complex of a redox switched crown ether

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• 作者：Osterloh ; Frank ; Saak ; Wolfgang ; Haase ; Detlev ; Pohl ; Siegfried
• 关键词：Nickel complex ; Crown ether ; Cryptand ; Crystal structure ; Redox properties
• 刊名：Polyhedron
• 出版年：1999
• 出版时间：May 28, 1999
• 年：1999
• 卷：18
• 期：14
• 页码：1957-1960
• 全文大小：129 K

文摘

The complex [Ni(LS₂)] was obtained by the reaction of L(SH)₂ (N,N′-bis(o-mercaptophenoxyacetyl)-1,10-diaza-4,7,13,16-tetraoxaoctadecan) with either Ni(acac)₂ or Ni(OAc)₂–4H₂O in DMSO or DMF. As elucidated using single X-ray crystallography, the Ni(II) ion in the neutral complex is located in a distorted octahedral S₂O₄ coordination sphere that consists of two thiolate S atoms, two carboxamide O atoms and two ether O atoms which stem from the thiophenoxyacetyl sidechains in LS₂. The complex can be oxidized in DMF solution at +0.27 V, +0.75 V, +1.26 V and reduced at −1.10 V (vs. SCE).