Ferrocenyl ligands-III. Bulky ferrocenyl derivatives. 1,1′-Bis(diphenylphosphino)-3,3′-bis(trimethylsilyl)ferrocene. Synthesis, metal complexation and the crystal and molecular structure
作者:Richard A. Brown、Andrew Houlton、Roger M.G. Roberts、Jack Silver、Christopher S. Frampton
DOI:10.1016/s0277-5387(00)80230-2
日期:1992.1
The attempted syntheses of ferrocenyl phosphines with bulky substituents are reported using N,N,N′,N′-tetramethylethylenediamine (TMED)/BuLi metallation reactions. 1,1′-3,3′-Tetrakis(trimethylsilyl)ferrocene was prepared by this route and also the title compound I. Attempts to prepare 1,1′-bis(triorganotin)3,3′-bis(trimethylsilyl)-ferrocenes failed. Only one of the two diastereomeric forms of I was
使用N,N,N′,N′-四甲基乙二胺(TMED)/ BuLi金属化反应报道了尝试合成具有大取代基的二茂铁基膦。1,1'- 3,3'-四(三甲基甲硅烷)二茂铁,通过该路线,并且还标题化合物制备予。制备1,1'-双(三有机锡)3,3'-双(三甲基甲硅烷基)-二茂铁的尝试失败。仅获得I的两种非对映异构形式之一,表明前体1,1'-双(三甲基甲硅烷基)二茂铁的区域特异性金属化。提出了对该异构体的单晶X射线研究,其结构显示了PPh 2的顺式排列组。如I的13 C NMR光谱中的长距离磷-碳偶联所揭示的,这导致两个磷原子的贯穿空间相互作用。还包括一些I的金属配合物的初步研究以及31 P NMR和57 FeMössbauer的光谱数据。