Developments in the rational creation of chiral multinuclear and metallosupramolecular compounds based on linear-type metal complexes with penicillaminate (pen), as well as their functionality as a multidentate chiral metalloligand, is the main subject of this paper. The reactions of a mononuclear AuI complex, [Au(D-pen)2]3−, in which two D-pen ligands bind to an AuI center through thiolato S atoms, with transition metal ions afford a variety of S-bridged heterobimetallic multinuclear complexes, the structures and properties of which are highly dependent on the nature of reacting metal ions. The created multinuclear complexes still act as a metalloligand when they possess free amine and/or carboxylate groups, leading to the formation of heterotrimetallic supramolecular structures by reacting with third metal ions. While the Au–S bonds in [Au(D-pen)2]3− are generally retained in the course of the reactions with metal ions, this is not the case for the Hg–S bonds in the corresponding HgII complex, [Hg(D-pen)2]2−. A remarkable chiral behavior of multinuclear complexes composed of [Au(L-cys)2]3− (cys = cysteinate), which is opposite to that composed of [Au(L-pen)2]3−, is also presented.
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