Novel Mixed-Metal Alkoxide Clusters of Lanthanide and Sodium: Synthesis and Extremely Active Catalysts for the Polymerization of ε-Caprolactone and Trimethylene Carbonate

Novel mixed-metal alkoxide clusters of lanthanide and sodium [Ln2Na8(OCH2CH2NMe2)12(OH)2], which were synthesized in reproducible high yields and structurally characterized, were found to be extremely active catalysts for the ring-opening polymerization of e-caprolactone and trimethylene carbonate.