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 - Funding Information:
Acknowledgements-We thank the donors of the Petroleum Research Fund administered by the American Chemical Society for partial support of this work. This work was also supported by the National Science Foundation under EPSCoR grant no. GSR-9255223. The government has certain rights in this material. This work also received matching support from the State of Kansas. J. A. H. gratefully acknowledges the aid of Dr S. S. Huang and Peggy Mack of B. F. Goodrich Corporation in some aspects of polymer characterization.
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 -