Fig. 2: Synthesis of hydroxyl-functionalized ligands and the corresponding metal complexes.

a Phosphinophenolate nickel. b Perfluorophenyl-substituted phosphinophenolate nickel. c Phenoxy-imine titanium.

a Phosphinophenolate nickel. b Perfluorophenyl-substituted phosphinophenolate nickel. c Phenoxy-imine titanium.