Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

Shu Zhang*, Wen Chao Zhang, Dan Dan Shang, Zhi Qian Zhang, Yi Xian Wu

*Corresponding author for this work

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Abstract

Various vanadium complexes containing N-heterocyclic carbenes, VOCl3[1,3-R2(NCH=)2C:] (V1, R = 2,6-Me2C6H3; V2, R = 2,6-Et2C6H3; V3, R = 2,6-iPr2C6H3; V4, R = 2,4,6-Me3C6H2), have been synthesized and employed as catalyst precursors for ethylene/propylene copolymerization after activation by Et3Al2Cl3. Complex V4 showed higher catalytic activity of ca. 38 kg copolymer per (mol of V) per h and an ethylene/propylene copolymer with random monomer distribution could be prepared. Complex V3 consumed more cocatalyst than its analogues to reach higher catalytic activity. The obtained copolymers exhibit relatively narrow polydispersity and contain more randomly distributed monomer units than that the copolymers prepared by using the traditional vanadium catalytic system.

Original languageEnglish
Pages (from-to)15264-15270
Number of pages7
JournalDalton Transactions
Volume44
Issue number34
DOIs
Publication statusPublished - 25 Apr 2015
Externally publishedYes

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Zhang, S., Zhang, W. C., Shang, D. D., Zhang, Z. Q., & Wu, Y. X. (2015). Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes. Dalton Transactions, 44(34), 15264-15270. https://doi.org/10.1039/c5dt00675a