Copolymerization and Terpolymerization of CO2 and Epoxides Using a Soluble Zinc Crotonate Catalyst Precursor Academic Article uri icon

abstract

  • A soluble catalyst precursor derived from the reaction of zinc bis(trimethylsilyl)amide, Zn[N(SiMe3)2]2, and crotonic acid has been found to be extremely active toward the copolymerization of cyclohexene oxide and carbon dioxide with turnover frequencies approaching 35 g/g of Zn/h at 80 °C. This catalyst precursor was also demonstrated to be an efficient terpolymerization catalyst when propylene oxide or styrene oxide was added to the cyclohexene oxide/CO2 feed. Extensive characterization of the metal complex proved difficult, but 31P NMR studies have shown that only 10% of the anticipated epoxide binding sites were available for catalysis. This suggests that the complex has several structures at its disposal, only one of which is conducive to copolymerization.

author list (cited authors)

  • Darensbourg, D. J., & Zimmer, M. S.

publication date

  • January 1, 1999 11:11 AM