Chalcogenide centred gold complexes

Abstract

Chalcogenide-centred gold complexes are an important class of compounds in which a central chalcogen is surrounded by several gold atoms or gold and other metals. They have special characteristics such as unusual geometries, electron deficiency and properties such as luminescence or non-linear optical properties. The best known species are the trinuclear [E(AuPR3)3]+, 'oxonium' type species, that have high synthetic applicability, not only in other chalcogen-centred species, but in many other organometallic derivatives. The aurophilic interactions play an important role in the stability, preference for a particular geometry and luminescence properties in this type of derivatives (critical review, 117 references).

A comparative study between post-Hartree–Fock methods and density functional theory in closed-shell aurophilic attraction

“…It is well established that the attractive interactions between cations with d 8 , d 10 and s 2 configurations at both the intra-and intermolecular levels lead to the formation of dimers, oligomers, chains, sheets, clusters and nanoparticles [1][2][3][4][5][6][7][8]. This phenomenon is known as metallophilic attraction, and in the particular case of gold, as 'aurophilic attraction' [9][10][11][12][13][14][15].…”

Aurophilicity: The Effect of the Neutral Ligand L on [{ClAuL}2] Systems

“…For the early individual observations, see also the 1997 review by Pyykkç, [6] especially its Table 4 on MÀM Raman stretch measurements, Table 5 on the attraction energies from temperature-dependent NMR spectroscopy and Table 12 on early EHT calculations. The recent summaries of the empirical material on aurophilicity comprise Doerrer, [14,15] Gimeno and Laguna, [16,17] or Schmidbaur and Schier. [3] We are not attempting here a review of the optical properties of metallophilic systems, the numerous cases of heteroatomic attractions, nor a general review of all specific cases known.…”

Theoretical study of the local reactivity of electrophiles of the type MPR 3 + (M = Cu, Ag, Au ;R = −H, -Me, -Ph)

“…We are using the approximate relationship for the nucleophilic Fukui function expressed in terms of the frontier LUMO (Ф LUMO ), as: f+≈−Ф LUMO | 2 [36]. Figures 3,4,5 show the LUMO level in the MPR 3 + fragments at the B3LYP level. Similar results are obtained for the other methods used in this work.…”

“…The coin metal phosphine fragment [M(PR 3 )] + (M=Au, Ag, Cu) has been extensively used in organometallic and inorganic clusters [1][2][3][4][5][6]. The [M(PR 3 )] + fragments are Lewis acids, still they are always found as terminal ligands in a large number of complexes.…”

“…The [M(PR 3 )] + fragments are Lewis acids, still they are always found as terminal ligands in a large number of complexes. In particular, triphenylphosphines (PPh 3 ) are used in many synthesized coin clusters because it acts as a stabilizing agent [4][5][6]. In the literature it is possible to find several examples that illustrate this situation.…”