1,1‘-Oligosilylferrocene Compounds

1,1‘-Bis[tris(trimethylsilyl)silyl]ferrocene (1) was prepared by reaction of 2 equiv of lithiated tris(trimethylsilyl)silylcyclopentadiene with FeBr2. Treatment of 1 with 2 equiv of potassium tert-butoxide gave 1,1‘-bis[bis(trimethylsilyl)potassiosilyl]ferrocene (2). Reactions of 2 with several dielectrophiles led to the formation of a number of novel 1,1‘-polysilyl ansa-ferrocenes with different heteroelements in the bridge.1,1'-双[三(三甲基硅基)硅基]二茂铁（1）可通过2当量的锂化三(三甲基硅基)硅基环戊二烯与溴化亚铁（FeBr₂）反应制得。将化合物1与2当量的叔丁醇钾反应，可得到1,1'-双[双(三甲基硅基)钾硅基]二茂铁（2）。化合物2与数种双亲电试剂发生反应，可生成一系列桥连部分含不同杂原子的新型1,1'-多硅基桥联二茂铁（ansa-ferrocenes）。