Zinc Complexes of Sequential Tetradentate Monoanionic Ligands in the Isoselective Polymerization of rac-Lactide.
Zinc complexes of {ONNN}-type sequential tetradentate monoanionic ligands reacted with diethylzinc to give the mononuclear ethylzinc complexes. The benzyloxy complexes were formed readily and were found to be highly active as well as living/immortal catalysts for ring-opening polymerization of rac-lactic acid with a clear isospecific inclination. Chiral gas chromatography analysis revealed a mild preference for a given lactide enantiomer by the chiral catalysts.
School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel.
Tomer
T
Rosen
School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel.
Yanay
Y
Popowski
School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel.
Israel
I
Goldberg
School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel. moshekol@post.tau.ac.il.
Moshe
M
Kol
enantioselectivity; gas chromatography; ligand design; ring-opening polymerization; zinc