Halides vanadocenes

Vanadocene halide is another important analog that is transformed to various vanadocene derivatives. Vanadocene chloride is prepared from vanadium(III) chloride and thallium cyclopentadienide or vanadocene and hydrogen chloride. Vanadocene dihalide is similarly synthesized from vana-dium(IV) halide via nucleophilic substitution. " Displacement of the chloro group results in functionalization as shown in Scheme 15. 

Ring-bridged vanadocene halide and dihalide, (28) and (29) are obtained from bis(cyclopentadienyl)-substituted dianion (27) as shown in Scheme 16. Furthermore,... 

Group VA Vanadium. Oxidative additions of organic halides to vanadocene, (f) -Cp)2V(II), gives few stable metal alkyls most react and decompose to R—R . The cases examined occur by one-electron oxidations ... 

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