Cooperative H2 Activation on Dicopper(I) Facilitated by Reversible Dearomatization of an “Expanded PNNP Pincer” Ligand

Abstract

A naphthyridine‐derived expanded pincer ligand is described that can host two copper(I) centers. The proton‐responsive ligand can undergo reversible partial and full dearomatization of the naphthyridine core, which enables cooperative activation of H2 giving an unusual butterfly‐shaped Cu4H2 complex