Ethylene polymerization catalysis by vanadium-based systems bearing sulfur-bridged calixarenes

Redshaw, Carl; Clowes, Lucy; Hughes, David L.; Elsegood, Mark R.J.; Yamato, Takehiko

Abstract

Calixarenes bridged by thia (?S?), sulfinyl (?SO?), or sulfonyl (?SO 2-) linkers have been employed as ancillary ligands in vanadium-based ethylene polymerization and in the ring-opening polymerization of ε-caprolactone. For ethylene polymerization, all pro-catalysts [PPh 4][VOCl2(R-calix[4]areneH2)] (R = p-tert-butylthia (?S?) (1), sulfinyl (?SO?) (2), sulfonyl (?SO2?) (3)) were highly active, with the system bearing the sulfonyl (?SO 2?)-bridged calixarene displaying enhanced activity. The molecular structures of pro-catalysts 2 and 3 are reported. Pro-catalysts 1?3 were inactive for the ROP of ε-caprolactone. © 2011 American Chemical Society.

Citation

Redshaw, C., Clowes, L., Hughes, D. L., Elsegood, M. R., & Yamato, T. (2011). Ethylene polymerization catalysis by vanadium-based systems bearing sulfur-bridged calixarenes. Organometallics, 30(21), 5620-5624. https://doi.org/10.1021/om200402u

• Journal Article Type: Article
• Online Publication Date: Oct 14, 2011
• Publication Date: Nov 14, 2011
• Deposit Date: Jun 8, 2022
• Journal: Organometallics
• Print ISSN: 0276-7333
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 30
• Issue: 21
• Pages: 5620-5624
• DOI: https://doi.org/10.1021/om200402u
• Keywords: Ethylene polymerization; Hydrocarbons; Ligands; Mathematical methods; Oxygen
• Public URL: https://hull-repository.worktribe.com/output/3622357