Gold and silver complexes with the ferrocenyl-pyrazolate ligand FcCH2pz

We have synthesized a series of gold(l), gold(111) or silver(l) derivatives with ferrocenylmethylpyrazole (pzCH(2)Fc) as ligand. X-ray structure determination for [Au(C6F5)(pzCH(2)Fc)] 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) angstrom. These molecules are further assembled into chains and the chains into a 3D structure through several hydrogen bonds. [Ag(OTf)(pzCH(2)Fc)] (OTf = triflate) is a dimer with a distorted tetrahedral geometry at the silver(l) centre and the triflate acting as bridging ligand. (c) 2005 Elsevier B.V. All rights reserved.