Perfectly Alternating and Regioselective Copolymerization of Carbonyl Sulfide and Epoxides by Metal-Free Lewis Pairs. Academic Article uri icon


  • The preparation of perfectly alternating and regioslective copolymers derived from the copolymerization of carbonyl sulfide (COS) and epoxides by metal-free Lewis pair catalysts composed of a Lewis base (amidine, guanidine, or quaternary onium salts) and a Lewis acid (triethyl borane) is described. Colorless and highly transparent copolymers of poly(monothiocarbonate) were successfully obtained with over 99% tail-to-head content and high molecular weight (up to 92.5kgmol-1 ). In most instances, oxygen-sulfur exchange reactions (O/S ERs), which would generate random thiocarbonate and carbonate units, were effectively suppressed. The turnover frequencies (TOF) of these Lewis pair catalyzed processes were as high as 119h-1 at ambient temperature.

published proceedings

  • Angew Chem Int Ed Engl

altmetric score

  • 2

author list (cited authors)

  • Yang, J., Wu, H., Li, Y., Zhang, X., & Darensbourg, D. J.

citation count

  • 129

complete list of authors

  • Yang, Jia-Liang||Wu, Hai-Lin||Li, Yang||Zhang, Xing-Hong||Darensbourg, Donald J

publication date

  • May 2017