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Issue 34, 2015
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Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

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Abstract

Various vanadium complexes containing N-heterocyclic carbenes, VOCl3[1,3-R2(NCH[double bond, length as m-dash])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.

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

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Publication details

The article was received on 21 Feb 2015, accepted on 25 Apr 2015 and first published on 30 Apr 2015


Article type: Paper
DOI: 10.1039/C5DT00675A
Citation: Dalton Trans., 2015,44, 15264-15270
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    Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

    S. Zhang, W. Zhang, D. Shang, Z. Zhang and Y. Wu, Dalton Trans., 2015, 44, 15264
    DOI: 10.1039/C5DT00675A

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