Ni(ii) and Pd(ii) complexes of a new redox-active pentadentate azo-appended 2-aminophenol ligand: Pd(ii)-assisted intraligand cyclization forms a phenoxazinyl ring

Abstract

Square planar complexes of Ni(II) and Pd(II) of a new redox-active pentadentate azo-appended 2-aminophenol ligand (H4L = N,N'-bis(2-hydroxy-3,5-di-tert-butylphenyl)-2,2'-diamino-ortho-azobenzene) in three accessible redox levels [amidophenolate(2−), semiquinonate(1−) π radical and quinone (0)]...