587884-94-4Relevant academic research and scientific papers
'Tucked-in' titanocene alkyls and alkylidenes
Van Der Heijden, Harry,Hessen, Bart
, p. 27 - 36 (2003)
Titanocene neopentyl complexes with one cyclometallated tert-butylcyclopentadienyl group, (η5-C5H4R)(η5,η 1-C5H4CMe2CH2)Ti (CHCMe3), are readily obtained from the corresponding titanocene dichlorides and bis(neopentyl)magnesium. These compounds lose neopentane by α-H abstraction from the cyclometallated ligand to generate alkylidene species in which the alkylidene moiety is connected to one of the cyclopentadienyl ligands. The alkylidene (C5H4Me)(C5H4CMe2CH) Ti(PMe3) reacts with benzene-d6 by stereoselective addition of a C-D bond across the Ti=C bond. These 'tucked-in' alkylidene species also exhibit a wide range of reactivity towards unsaturated substrates (alkynes, ethene, benzonitrile), initiated by cycloaddition to the Ti=C bond.
