Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 16, A-8010 Graz, Austria.
J Am Chem Soc. 2009 Nov 4;131(43):15952-62. doi: 10.1021/ja905654r.
Reactions of 1,2-dipotassiotetrakis(trimethylsilyl)disilane with group 4 metallocene dichlorides lead to the formation of the respective metallocene 1,1,2,2-tetrakis(trimethylsilyl)disilene complexes. While the disilene titanocene complex could be structurally characterized, the zirconocene and hafnocene compounds, which are believed to possess some degree of bis-[bis(trimethylsilyl)silylene] character, can only be isolated in substance as the respective trimethylphosphane adducts. Analogous metallocene 1,1,2,2-tetrakis(trimethylsilyl)digermene complexes and a tetrakis(trimethylsilyl)silagermene complex were prepared. Instead of metallocene 1,1,2,2-tetrakis(trimethylsilyl)distannene complexes, four-membered rings composed of a metallocene and three bis(trimethylsilyl)stannylene units were obtained.
1,2-双(三甲基甲硅基)二硅烷与第 4 族茂金属二氯化物的反应导致相应茂金属 1,1,2,2-四(三甲基甲硅基)二硅烯配合物的形成。虽然可以对二硅烯钛茂配合物进行结构表征，但锆茂和钽茂化合物，据信具有一定程度的双-[双(三甲基甲硅基)亚硅基]性质，只能作为相应的三甲基膦加合物在物质上分离。类似的茂金属 1,1,2,2-四(三甲基甲硅基)二锗烯配合物和四(三甲基甲硅基)硅锗烯配合物也被制备。得到的不是茂金属 1,1,2,2-四(三甲基甲硅基)二锡烯配合物，而是由一个茂金属和三个双(三甲基甲硅基)锡烯单元组成的四元环。
