SEARCH Articles Figures Tables Complexes of Open-Chain Tetradenate Ligands Containing Heavy Donor Half-open metallocenes ligand complexes Ligand Design in Enantioselective Ring-opening Polymerization of Lactide Ligand complexes of open metallocenes Zr Ligand design enantioselective ring-opening Ligand open chain Ligands, quadridentate open-chain Open metallocenes ligand complexes