Aurophilic interaction

Olmstead, M.M., Jiang, F., Attar, S. and Balch, A.L. (2001) Alteration of the aurophilic interactions in trimeric Gold(I) compounds through charge transfer, behavior of solvoluminescent Au3(MeN=COMe)3 in the presence of electron acceptors. Journal of the American Chemical Society, 123, 3260. 

Another interesting example of aurophilic interactions influencing electronic excited state properties is the unusual photochemical cis to trans conversion observed in dinudear goldhalide bis(diphenylphosphino)ethylene complexes, Au2X2(dppee)... 

Ray, L., Shaikh, M.M. and Ghosh, P. (2008) Shorter Argentophilic Interaction than Aurophilic Interaction in a Pair of Dimeric (NHC)MC1 2 (M=Ag, Au) Complexes Supported over a N/O-Functionalized N-Heterocyclic Carbene (NHC) Ligand. Inorganic Chemistry, 47, 230-240. 

Besides this, the remarkable properties of gold(I) compounds, which often give rise to aurophilic interactions and/or to luminescence, are of interest when these properties are transported into the liquid crystal field. Although there is much still to be studied, it is already clear that luminescence can survive in the condensed but mobile state of a mesophase, and even in the isotropic liquid state of a molten gold compound. It also seems that aurophilicity can contribute in some cases to the formation of mesophases. 

The dicyanoaurate anion [Au(CN)2] is one of the most simple molecules that show aurophilic interactions,2282-2284 and thus has been used as building blocks to obtain supramolecular structures as in the complexes of Cu11 with [Au(CN)2]- and different amines.2285-2 7 It has been found that solutions of K[Au(CN)2] in water and methanol exhibit a strong photoluminescence.2288 Also... 

Me2C6H3NC, Bu NC) have been prepared by treatment of the silver sulfinate with [AuCIL]. The crystal structure also consists of pairs of the homoleptic derivatives [Au(PPh3)2]+[Au(S20-p-Tol)2] (571) bonded through aurophilic interactions.276... 

The structure of the trimer [Au3(NC5H4)3] has been studied and shows that individual molecules self-associate through aurophilic interactions into two distinct structural motifs that involve both extended chains of molecules connected by pairwise and individual Au---Au contacts, and discrete dimers linked by pairwise Au---Au interactions (Figure 25).3131... 

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