TY - JOUR
T1 - The role of two-component catalysts containing chelating bisaryloxide ligands in controlling the stereochemistry of the metathesis polymerization of norbornene
AU - Barnes, Denise L.
AU - Eilerts, Nancy W.
AU - Heppert, Joseph A.
AU - Huang, Wayne H.
AU - Morton, Martha D.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1994/4
Y1 - 1994/4
N2 - The ring-opening metathesis polymerization of norbornene and 5,5-dimethylnorbornene has been studied with a range of tungsten(VI) ring-opening metathesis polymerization procatalysts containing chelating diolate ligands, including catechols, 1,8-dihydroxynaphthalene, 1,1′-bi-2-naphthol, biphenanthrol and bis(2-hydroxyphenyl) methane. One class of these catalysts, W(X)(OArO)Cl2(THF) (X = O or NArMe2) was produced via alcoholysis reactions between W(X)Cl4 and the respective diol. Polymers of norbornene produced with these catalysts showed a reasonable correlation between ring size and cis-selectivity. This effect is most likely steric in origin. Analyses of the tacticity of poly-5,5-dimethylnorbornene showed a correlation betwen high cis-olefin content and syndiotacticity, even when produced with catalysts containing asymmetric chelating diolate ligands.
AB - The ring-opening metathesis polymerization of norbornene and 5,5-dimethylnorbornene has been studied with a range of tungsten(VI) ring-opening metathesis polymerization procatalysts containing chelating diolate ligands, including catechols, 1,8-dihydroxynaphthalene, 1,1′-bi-2-naphthol, biphenanthrol and bis(2-hydroxyphenyl) methane. One class of these catalysts, W(X)(OArO)Cl2(THF) (X = O or NArMe2) was produced via alcoholysis reactions between W(X)Cl4 and the respective diol. Polymers of norbornene produced with these catalysts showed a reasonable correlation between ring size and cis-selectivity. This effect is most likely steric in origin. Analyses of the tacticity of poly-5,5-dimethylnorbornene showed a correlation betwen high cis-olefin content and syndiotacticity, even when produced with catalysts containing asymmetric chelating diolate ligands.
UR - http://www.scopus.com/inward/record.url?scp=0001166892&partnerID=8YFLogxK
U2 - 10.1016/S0277-5387(00)80260-0
DO - 10.1016/S0277-5387(00)80260-0
M3 - Article
AN - SCOPUS:0001166892
VL - 13
SP - 1267
EP - 1275
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
IS - 8
ER -