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

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

doi:10.1021/om200402u

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

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

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34 Citations (Scopus)

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.

Original language	English
Pages (from-to)	5620–5624
Number of pages	5
Journal	Organometallics
Volume	30
Issue number	21
Early online date	14 Oct 2011
DOIs	https://doi.org/10.1021/om200402u
Publication status	Published - 14 Oct 2011

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10.1021/om200402u

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title = "Ethylene polymerization catalysis by vanadium-based systems bearing sulfur-bridged calixarenes",

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.",

author = "Carl Redshaw and Lucy Clowes and Hughes, {David L.} and Elsegood, {Mark R. J.} and Takehiko Yamato",

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TY - JOUR

T1 - Ethylene polymerization catalysis by vanadium-based systems bearing sulfur-bridged calixarenes

AU - Redshaw, Carl

AU - Clowes, Lucy

AU - Hughes, David L.

AU - Elsegood, Mark R. J.

AU - Yamato, Takehiko

PY - 2011/10/14

Y1 - 2011/10/14

N2 - 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.

AB - 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.

U2 - 10.1021/om200402u

DO - 10.1021/om200402u

M3 - Article

VL - 30

SP - 5620

EP - 5624

JO - Organometallics

JF - Organometallics

SN - 0276-7333

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