Titanium, aluminum and zinc complexes containing diamine-bis(benzotriazole phenolate) ligands: Synthesis, structural characterization and catalytic studies for ring-opening polymerization of ε-caprolactone

Structurally diverse titanium, aluminum and zinc complexes bearing diamine-bis(benzotriazole phenolate) ligands were synthesized and fully characterized by single crystal X-ray crystallography. Di-Zn complex 4 is an effective catalyst for ring-opening polymerization of ε-caprolactone in the presence of 9-anthracenemethanol (9-AnOH), affording polymers with good molecular weight control and narrow PDIs (<1.15).120