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

Redshaw, Carl, Clowes, Lucy, Hughes, David L., Elsegood, Mark R. J. and Yamato, Takehiko (2011) Ethylene polymerization catalysis by vanadium-based systems bearing sulfur-bridged calixarenes. Organometallics, 30 (21). 5620–5624.

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Abstract

Calixarenes bridged by thia (-S-), sulfinyl (-SO-), or sulfonyl (-SO2-) linkers have been employed as ancillary ligands in vanadium-based ethylene polymerization and in the ring-opening polymerization of e-caprolactone. For ethylene polymerization, all pro-catalysts [PPh4][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 (-SO2-)-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 e-caprolactone.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry
Depositing User:	Rachel Smith
Date Deposited:	21 Jul 2011 12:46
Last Modified:	23 Nov 2022 09:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/34030
DOI:	10.1021/om200402u

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