作者:Han Vinh Huynh、Christian Schulze-Isfort、Wolfram W. Seidel、Thomas Lügger、Roland Fröhlich、Olga Kataeva、F. Ekkehardt Hahn
DOI:10.1002/1521-3765(20020315)8:6<1327::aid-chem1327>3.0.co;2-n
日期:2002.3.15
of 1(4-) for 2(4-) on nickel (-785 mV for 11 b versus -1130 mV for 14, relative to ferrocene) affects the redox potential to a similar degree as the substitution of nickel for cobalt (-1160 mV for [Co(2)(1)(2)](2-)/[Co(2)(1)(2)](4-), relative to ferrocene). The redox waves display a markedly less reversible behavior for complexes with the shorter bridged ligand 2(4-) compared to those of 1(4-).
作为针对与苯二硫醇盐供体的螺旋配位化合物进行更广泛研究的一部分,我们合成了双(苯二硫醇)配体1,2-双(2,3-二巯基苯甲酰胺基)乙烷(H(4)-1)和1,2 -双(2,3-二巯基苯基)乙烷(H(4)-2)。两种配体均与Ni(II),Ni(III)形成双核络合物,并在空气氧化后在平衡条件下形成Co(III)离子。配合物(NEt(4))(4)[Ni(II)(2)(1)(2)](11 b),(NEt(4))(2)[Ni(III)(2)(1) (2)](13)和Na(4)[Ni(II)(2)(2)(2)](14)通过X射线衍射表征。在所有络合物中,两个正方形平面的[Ni(S(2)C(6)H(3)R)(2)]单元通过碳骨架以双链方式连接,并且它们假定共平面排列像楼梯一样。循环伏安研究表明氧化还原电势对配体类型的强烈依赖性。镍上2(4-)的1(4-)取代(11b为-785 mV相对于二茂铁为14130