211575-05-2Relevant academic research and scientific papers
Preparation and characterization of (R2N)2VCl2 [R=Cy, i-Pr] and its activity as olefin polymerization catalyst
Desmangles, Natalie,Gambarotta, Sandro,Bensimon, Corinne,Davis, Stephen,Zahalka, Hayder
, p. 53 - 60 (1998)
Reaction of VCl3(THF)3 with one equivalent of R2NLi [R=i-Pr, Cy] formed the tetravalent (R2N)2VCl2 [R=i-Pr (1a), Cy (1b)] which was isolated in crystalline form. The formation of these species is likely to be ascribed to a disproportionation reaction since a divalent vanadium complex, VCl2(TMEDA)2 complex was isolated upon treatment of the reaction mixtures with TMEDA. Complexes 1 can be alkylated with RLi to yield the corresponding (R2N)2VR2 (2) derivatives in good yield. Preliminary data on ethylene-propylene (EP) co-polymerization obtained with compounds 1 in conjunction with various aluminum alkyl compounds are described.
