"click" tetradentate ligands

Article abstract of DOI:10.1039/b922043g

A series of triazole-based N4 tetradenate ligands 1a-d are efficiently synthesized using Cu^I-catalyzed azide-alkyne "click" strategy and are readily coordinated to many metal ions (e.g. Mn^II, Ni^II, Zn^II and Fe^II). The X-ray structures of the resultant metal-complexes (4a-d, 5a, 6a and 7a) reveal an octahedral mononuclear structure with two co-ligands bonded in cis sites and the two triazoles as nitrogen donors to the metal center. The Mn^II-complexes (4a-d) show efficient catalytic activities in the epoxidation of various aliphatic terminal olefins with peracetic acid, and feature with low catalyst loading, fast conversion and high yields. The Royal Society of Chemistry 2010.