Gold and silver complexes with the ferrocenyl-pyrazolate ligand FcCH2pz

We have synthesized a series of gold(I), gold(III) or silver(I) derivatives with ferrocenylmethylpyrazole (pzCH2Fc) as ligand. X-ray structure determination for [Au(C6F5)(pzCH2Fc)] reveals a linear geometry for the gold centre and association of the molecules in pairs through intermolecular gold(I)–gold(I) interactions of 3.1204(6) Å. These molecules are further assembled into chains and the chains into a 3D structure through several hydrogen bonds. [Ag(OTf)(pzCH2Fc)] (OTf = triflate) is a dimer with a distorted tetrahedral geometry at the silver(I) centre and the triflate acting as bridging ligand.