Sn(OTf)₂andSc(OTf)₃arehighlyefficientandversatilecatalystsforthecontrolledpolymerizationoflactones.TheseLewisacidcatalystsexhibitexcellentactivityandselectivity,enablingprecisecontrolovermolecularweight,polydispersity,andend-groupfunctionalityintheresultingpolyesters.Theirstrongelectrophiliccharacterfacilitatesrapidinitiationandpropagation,whiletheircompatibilitywithvariousmonomersandreactionconditionsmakesthemsuitableforawiderangeoflactonepolymerizationapplications.TheuseofSn(OTf)₂andSc(OTf)₃offersarobustandscalableapproachtosynthesizewell-definedpolyesterswithtailoredpropertiesforbiomedical,packaging,andspecialtymaterials.
