Stable O,N-heterocyclic plumbylenes bearing sterically hindered o-amidophenolate ligands

The reaction of dilithium salts of 4,6-di-tert-butyl-N-(R)-o-aminophenols with PbCl₂ leads to the formation of new O,N-heterocyclic plumbylenes [R is Bu^t or dipp (2,6-diiso-propylphenyl)]. Both compounds possess dimeric structure in crystals according to the X-ray analysis of a single crystal. The formation of unstable paramagnetic plumbylene was detected during an oxidation of 4,6-di-tert-butyl-N-(tert-butyl)-o-aminophenolatolead(II) with HgBr₂.