New Dinuclear Nickel(II) Complexes: Synthesis, Structure, Electrochemical, and Magnetic Properties
作者:Dmitry Yakhvarov、Ekaterina Trofimova、Oleg Sinyashin、Olga Kataeva、Yulia Budnikova、Peter Lönnecke、Evamarie Hey-Hawkins、Andreas Petr、Yulia Krupskaya、Vladislav Kataev、Rüdiger Klingeler、Bernd Büchner
DOI:10.1021/ic2002546
日期:2011.5.16
[Ar = Ph, 2,4,6-trimethylphenyl (Mes), 9-anthryl (Ant)] leads to the formation of binuclear nickel(II) complexes with bridging ArP(H)O2− ligands. Crystal structures of the binuclear complexes [Ni2(μ-O2P(H)Ar)2(bpy)4]Br2 (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
[NiBr 2(bpy)2 ](bpy = 2,2'-联吡啶)与有机次膦酸ArP(O)(OH)H [Ar = Ph,2,4,6-三甲基苯基(Mes),9 -anthryl(ANT)]导致双核镍(II)配合物与桥接破甲(H)O的形成2 -配体。双核络合物[Ni 2(μ - O 2 P(H)Ar)2(bpy)4 ] Br 2的晶体结构(Ar = Ph,Mes,Ant)已确定。在每个结构中,金属离子都扭曲了八面体配位,并被两个芳基膦酸酯配体双重桥接。磁化率测量表明,这些配合物在低温下在两个镍原子之间显示出强反铁磁耦合,显然类似于具有桥连羧基配体的双核镍(II)配合物。循环伏安法和原位EPR光谱电化学表明,这些配合物可以被电化学还原和氧化,形成Ni(I),Ni(0)/ Ni(III)衍生物。