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- W2077009415 abstract "Abstract The ring-opening metathesis polymerization (ROMP) of norbornene catalyzed by bis(acetonitrile) molybdenum and tungsten complexes, [M(η 3 -C 3 H 5 )Cl(CO) 2 (NCMe) 2 ] ( 1-Mo: M = Mo, 1-W: M = W), which have two labile acetonitrile ligands, has been investigated. These complexes catalyzed the ROMP of norbornene as a single-component initiator. The highly cis -selective polymerization proceeded in a THF solution (95% for 1-Mo and 96% for 1-W ), whereas polymerization in CH 2 Cl 2 or toluene resulted in lower cis selectivity. The polymerization of terminal acetylenes using these complexes was also examined. The tungsten complex 1-W showed a high catalytic activity for the polymerization of terminal acetylenes, such as phenyl- and tert -butylacetylene. A highly active catalytic system for the ROMP of norbornene was achieved by the activation of the tungsten complex, 1-W , with one equivalent of phenylacetylene, giving poly(norbornene) with a high molecular weight ( M n = 391 × 10 4 ) and a high cis selectivity ( cis ∼ 89%)." @default.
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- W2077009415 date "2005-08-05" @default.
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- W2077009415 title "Metathesis polymerization of norbornene and terminal acetylenes catalyzed by bis(acetonitrile) complexes of molybdenum and tungsten" @default.
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- W2077009415 doi "https://doi.org/10.1016/j.molcata.2005.06.052" @default.
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