Divergent [{ONNN}Mg-Cl] complexes in highly active and living lactide polymerization

Tomer Rosen, Israel Goldberg, Wanda Navarra, Vincenzo Venditto*, Moshe Kol

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Chloro-magnesium complexes of divergent tetradentate-monoanionic {ONNN}-type ligands which formed as either mononuclear or dinuclear complexes are reported. These complexes catalyze the ring-opening polymerization of lactide with high activity and in a living manner, and enable the synthesis of well-defined stereo-diblock copolymers with Mn > 200 kDa, as well as stereo-n-block copolymers (n = tri, tetra) with high molecular weights by sequential monomer addition. Thermal and crystallographic characterizations revealed that even the very high molecular weight PLA copolymers crystallized in a stereocomplex phase, and that their degradation temperature was as high as 354 °C.

Original languageEnglish
Pages (from-to)5476-5481
Number of pages6
JournalChemical Science
Issue number8
StatePublished - 2017


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