Rare earth naphthenates and phosphonates with trialkylaluminum compounds were investigated as catalysts for the polymerization of 1-alkynes. The neodymium naphthenate/ triisobutylaluminum system was found to promote high conversions to polymers of relatively high molecular weights in the case of alkyl-substituted acetylenes. The polymers obtained showed, by infrared spectroscopy, high cis content in the polyconjugated chains.

Rare earth compounds and trialkylaluminum compounds can effectively polymerize 1-alkynes, producing high molecular weight polymers with high cis content.

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Polymerization of terminal alkynes by rare earth compound/trialkylaluminum catalysts

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