Stereoselective ring-opening polymerization of rac-lactide catalyzed by the proton sponge bisphosphazene 1,8-bis(hexamethyltriaminophosphazenyl)naphthalene

Stereoselective ring-opening polymerization of rac -lactide was catalyzed by the proton sponge bisphosphazene HMPN, affording semicrystalline isotactic polylactide with P m up to 0.93.