Di- and trinuclear complexes with the mono- and dianion of 2,6-bis(phenylamino)pyridine: high-field displacement of chemical shifts due to the magnetic anisotropy of quadruple bonds

Research has been conducted on the monoanion and dianion of 2,6-bis(phenylamino)pyridine. Results indicate that the monoanion supports quadruply bonded Cr (sub)2 (super)4+ and Mo (sub)2 (super)4+ units in Cr (sub)2 (HBPAP) (sub)4 and Mo (sub)2 (HBPAP) (sub)4, and that the dianion stabilizes the trinuclear complexes.