Anionic gold

The reaction of the anionic gold(I) complex PPN[Au(C6F5)Cl] with [MeSi Me2SiN (p-tol) 3SnLi(OEt2)] leads to formation of an anionic complex with a Sn—An bond, shown in Equation 3.8, whose P H NMR spectrum shows a singlet at 47.5 ppm [81]. 

Novel anionic gold(I) and gold(III) organocomplexes. Journal of Organometallic Chemistry, 131(3), 471 75. 

Yannouleas, C. and Landman, U. (2000) Decay channels and appearance sizes of doubly anionic gold and silver dusters. Physical Review B - Condensed Matter, 61, R10587-R10589. 

DF calculations were carried out on CO complexes of small neutral, cationic, and anionic gold clusters Au with n= 1-6. The -coordination mode (terminal C-coordination) was found to be the most favorable one irrespective of the charge of the cluster, and cluster planarity is more stable for the bare clusters and their carbonyls. As expected, adsorption energies are greatest for the cationic clusters, and decrease with size. Instead, the adsorption energies of... 

The reactivity of Au O clusters to oxygen as a function of n was measured by Salisbury and coworkers using time of flight mass spectroscopy. It was found that odd-n (even-n) clusters have negligible (significant) reactivity, which is explained by the fact that the O2 molecule, acting as a one-electron aceptor, binds to anionic gold clusters, which have an unpaired electron. 

Figure 11.11 Cyclophane derivatives and anionic gold NPs generate nanocomposite assemblies on an electrode surface. Adapted from Ref. 45 with permission.

A series of dinuclear anionic gold or mixed gold(I)/gold(III) compounds have been reported recently, all of them containing C6F5 as aryl group, probably due to the stabilizing... 

Kimble ML, Moore NA, Castleman AW Jr (2007) Reactivity of anionic gold oxide clusters towards CO Experiment and theory. Eur Phys J D 43 205... 

The best eluant found for the strong base resin A-500 was a mixture of thiourea and sulphuric acid. This eluant reacts chemically with the anionic gold complex on the resin (AuBr4+) and converts it to a cationic gold thiourea complex (AuTLH4). Since the cationic gold thiourea complex has absolutely no affinity for an anionic resin, gold elution is very fast and efficient ( 98%). This elution process has... 

---