Ni(II) Complexes of<i>N</i>,<i>N</i>′-Ethylenebis(<i>o</i>-mercaptobenzamide): A Quadridentate Thiolato Amide {S<sub>2</sub>N<sub>2</sub>} Ligand
作者:Takeshi Yamamura、Makoto Tadokoro、Nobuhumi Nakamura、Koji Tanaka、Kiyotaka Asakura
DOI:10.1246/bcsj.63.999
日期:1990.4
Three nickel(II) complexes with N,N′-ethylenebis(o-mercaptobenzamide), H4ebtsa, a quadridentate S2N2} ligand classified as a PAC (polyanionic chelating) ligand, were isolated. Although they were different in their apparent charges, their coordination units were revealed to be equal from their physicochemical behavior. They will be described as Ni(H2ebtsa). EXAFS and XANES study was undertaken for one of the new compounds, and the results were compared with those for similar three NiS2N2 complexes, (N,N′-ethylenebis(o-mercaptobenzylidenaminato))Ni(II), (N,N′-ethylenebis(o-mercaptobenzylaminato))Ni(II) and (NEt4)[Ni(SPh)4]. From these results and a comparison with the results for [Ni(ebtsa)]2, it was concluded that a square planar S2N2} unit was reliable as the coordination sphere of Ni(H2ebtsa). The character of the amide proton in the coordination unit was also studied.
我们分离出了三种与 N,N′-乙烯双(邻巯基苯甲酰胺)H4ebtsa(一种被归类为 PAC(多阴离子螯合)配体的四叉S2N2}配体)的镍(II)配合物。虽然它们的表观电荷不同,但从其物理化学行为来看,它们的配位单元是相等的。它们将被描述为 Ni(H2ebtsa)。对其中一种新化合物进行了 EXAFS 和 XANES 研究,并将研究结果与类似的三种 NiS2N2 复合物,即 (N,N′-乙烯双(邻巯基苄氨基))Ni(II)、(N,N′-乙烯双(邻巯基苄氨基))Ni(II) 和 (NEt4)[Ni(SPh)4] 的结果进行了比较。从这些结果以及与[Ni(ebtsa)]2 的结果比较中得出结论,Ni(H2ebtsa)的配位球是一个可靠的正方形S2N2}单元。此外,还研究了配位单元中酰胺质子的特性。