Group 4 initiators for the stereoselective ROP of rac-β-butyrolactone and its copolymerization with rac-lactideElectronic supplementary information (ESI) available: Further NMR and GPC analysis of the polymers, full experimental conditions for the synthesis and characterization of ligands and complexes. CCDC 841995. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c1cc15265c

In this paper we demonstrate the utility of Group 4 metals for the well-controlled and stereoselective (syndiotactic) ring opening polymerization (ROP) of rac-β-butyrolactone (BBL) and their ability to form copolymers. [ABSTRACT FROM AUTHOR]