New dinuclear nickel(II) complexes: synthesis, structure, electrochemical, and magnetic properties |
| |
Authors: | Yakhvarov Dmitry Trofimova Ekaterina Sinyashin Oleg Kataeva Olga Budnikova Yulia Lönnecke Peter Hey-Hawkins Evamarie Petr Andreas Krupskaya Yulia Kataev Vladislav Klingeler Rüdiger Büchner Bernd |
| |
Institution: | A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, Arbuzov Street 8, Kazan 420088, Russian Federation. yakhvar@iopc.ru |
| |
Abstract: | The reaction of NiBr(2)(bpy)(2)] (bpy = 2,2'-bipyridine) with organic phosphinic acids ArP(O)(OH)H Ar = Ph, 2,4,6-trimethylphenyl (Mes), 9-anthryl (Ant)] leads to the formation of binuclear nickel(II) complexes with bridging ArP(H)O(2)(-) ligands. Crystal structures of the binuclear complexes Ni(2)(μ-O(2)P(H)Ar)(2)(bpy)(4)]Br(2) (Ar = Ph, Mes, Ant) have been determined. In each structure, the metal ions have distorted octahedral coordination and are doubly bridged by two arylphosphinato ligands. Magnetic susceptibility measurements have shown that these complexes display strong antiferromagnetic coupling between the two nickel atoms at low temperatures, apparently similar to binuclear nickel(II) complexes with bridging carboxylato ligands. Cyclic voltammetry and in situ EPR spectroelectrochemistry show that these complexes can be electrochemically reduced and oxidized with the formation of Ni(I),Ni(0)/Ni(III) derivatives. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|