Dicopper−Dioxygen Complex Supported by Asymmetric Pentapyridine Dinucleating Ligand

A dicopper(I) complex supported by a novel asymmetric pentapyridine dinucleating ligand, consisting of tetradentate and tridentate
metal-binding sites, has been synthesized and characterized. The
dicopper(I) complex reacted with molecular oxygen at a low
temperature to give an unprecedented μ-peroxo dicopper(II)
complex presumably having a μ-η1:η2 binding mode, the spectroscopic features and the reactivity of which have been explored
in detail.