Two complexes of Pt~(IV) and Au~(III) with 2,2'-dipyridylamine and 2,2'-dipyridylaminide ligands

摘要

Two noble metal complexes involving ancillary chloride ligands and chelating 2,2'-bipyridylamine (Hdpa) or its deprotonated derivative (dpa), namely [bis(pyridin-2-yl-kappaV)-amine]tetrachloridoplatinum(IV), [PtCl_4(C_(10)H_9N_3)], and [bis-(pyridin-2-yl-kappaV)aminido]dichloridogold(III), [AuCl_2(C_(10)H_8-N_3)], are presented and structurally characterized. The metal atom in the former has a slightly distorted octahedral coordination environment, formed by four chloride ligands and two pyridyl N atoms of Hdpa, while the metal atom in the latter has a slightly distorted square-planar coordination environment, formed by two chloride ligands and two pyridyl N atoms of dpa. The difference in conjugation between the pyridine rings in normal and deprotonated 2,2'-dipyridylamine is discussed on the basis of the structural features of these complexes.