Two bio-inspired non-heme iron complexes bearing mixed tetradentate N-heterocyclic carbene/1,2,3-triazole ligands with cis labile coordination sites are reported. The compounds are studied in olefin epoxidation catalysis using H₂O₂ as oxidant. Sc(OTf)₃, HClO₄ and HOAc are applied as additives resulting in significant improvement of catalytic performance. Under optimized conditions the most active catalyst exhibits activities of 76,000 turnovers per hour, which is the highest reported value for an iron(II) catalyst. The complexes reveal comparably high stability and enable the challenging epoxidation of functionalized olefins. These results prove 1,2,3-triazoles to be promising and tunable ligands for iron catalyzed oxidation reactions.

报道了两个生物启发的非血红素铁配合物，它们带有具有顺式不稳定配位点的混合的四齿N-杂环卡宾/ 1,2,3-三唑配体。使用H ₂ O ₂作为氧化剂，在烯烃环氧化催化中研究了这些化合物。Sc（OTf）₃，HClO ₄将HOAc和HOAc用作添加剂可显着改善催化性能。在优化的条件下，活性最高的催化剂表现出每小时76,000次转换的活性，这是铁（II）催化剂的最高报道值。该配合物显示出相当高的稳定性，并且使功能化烯烃具有挑战性的环氧化。这些结果证明1,2,3-三唑是铁催化的氧化反应的有前途和可调配体。