Study of Dynamic NO Ligands on Ruthenium Complexes

Abstract

In this article, our study of dynamic NO ligands on ruthenium complexes has been reported. Transformation of NO ligand, linear NO+ and bent NO- form, is characteristic of NO ligand on transition metal complexes. However, such transformation and incorporation of NO ligand into organic molecules, the so-called dynamic NO ligands, have little observed. We found three types of the dynamic NO ligands. First topic is interconversion of NO ligand (linear NO+ and bent NO- form) in the chemistry of [2+2] cycloaddition reaction and protonation of vinylidene ruthenium complexes. In second topic, interesting reactivity of NO ligand on ruthenium complexes is described, where C–H activation and N–C coupling of NO ligand are included. Final attention is drawn to unprecedented N–N coupling of NO ligands on dinuclear ruthenium complexes. This N–N coupling is closely related with bacterial nitric oxide reductase (NOR). Use of the N–N coupling complexes achieved stepwise reproduction of the NOR catalytic process. These findings lead to new aspects in the chemistry of NO ligand on ruthenium complexes.