Facile and reversible double dearomatization of pyridines in non-phosphine Mn complexes with N,S-donor pyridinophane ligand.

Single and double dearomatization of pyridine rings was observed in Mn complexes with an N2S2 pyridinophane ligand via deprotonation of one or two CH arms, respectively. In contrast to other N,S-donor pincer-like systems, the dearomatized (N2S2)Mn species were found to be stable, with the dearomatization being reversible.