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Updated: Apr 12, 2026

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
Published on: November 29, 2018
Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes
Shu Zhang1, Wen-Chao Zhang, Dan-Dan Shang
1State Key Laboratory of Chemical Resource Engineering, Key Laboratory of carbon fiber and functional polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China. zhangshu@mail.buct.edu.cn wuyx@mail.buct.edu.cn.
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-(i)Pr2C6H3; 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.
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