Ethylene Polymerization Catalysis by Vanadium-Based Systems Bearing Sulfur-Bridged Calixarenes

Autor:	Mark R. J. Elsegood, Carl Redshaw, Takehiko Yamato, Lucy Clowes, David L. Hughes
Rok vydání:	2011
Předmět:	Sulfonyl chemistry.chemical_classification Organic Chemistry Vanadium chemistry.chemical_element Sulfur Catalysis Inorganic Chemistry chemistry Polymerization Ethylene polymerization Calixarene Polymer chemistry Organic chemistry Physical and Theoretical Chemistry
Zdroj:	Organometallics. 30:5620-5624
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om200402u
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::270bc74bbe93bd5c4e5cee7d2e2c10e6 https://doi.org/10.1021/om200402u Zobrazit plný text záznamu