ArticleChemPlusChem2026
Na- and K-Iminophosphorane-Phosphine Oxide Complexes as Catalysts for ROP of rac-Lactide.
Article in ChemPlusChem, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Two novel crown-ether complexes of sodium (compound 1) and potassium (compound 2) featuring iminophosphorane-phosphine oxide ligands are reported. The catalytic activity of these compounds toward the ring-opening polymerization (ROP) of rac-lactide was evaluated. The analogous Na (compound 3) and K (compound 4) complexes containing only the iminophosphorane-phosphine oxide ligand were also synthesized; however, their poor solubility precluded polymerization activity. In contrast, complexes 1 and 2 exhibited high catalytic activity, achieving >99% monomer conversion within 10 min at room temperature. Notably, polylactides obtained with complex 2 displayed molecular weights up to 31,500 g·mol
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