Dinuclear gold(III) pyrazolato complexes – Synthesis, structural characterization and transformation to their trinuclear gold(I) and gold(I/III) analogues

The reaction of AuCl3py with Na(pz∗) (pz∗ = pyrazolato, or substituted pyrazolato anion) yields stable dinuclear [cis -AuIIICl2(μ-pz∗)]2 complexes. In the presence of a base, the latter undergo reduction with concomitant transformation of the dinuclear View the MathML sourceAu2III-structure to trinuclear View the MathML sourceAu2IIIAuI, AuIIIView the MathML sourceAu2I (containing trans AuIIICl2-centres) and View the MathML sourceAu3I species.