Reductive elimination by remote electron transfer activation in C4-bridged titanocene-ferrocenyl complexes
Abstract
Of the new titanocene derivatives [Ti(CCC
CR)2(η5-C5H4R′)2][R = ferrocenyl (Fc); R′= H 1, SiMe3 2; R = R′= SiMe3 3], 3 is inert towards electrochemical or chemical oxidation while both 1 and 2 readily release a formal reductive elimination product Fc(C
C)4Fc via initial oxidation of the Fc units, suggesting that the process is induced by electron transfer from the Ti–C fragment to Fc+ through the conjugated diacetylide bridges.