Gold complexes thioethers

NMR experiments where undertaken to determine the site of coordination of the two other complexes. The thioether complex showed an upheld shift for the N-atom in the thioether gold complex and a similar result was obtained in the case of the thiazole compound, confirming imine coordination. 

Key words Amino acids. Catalytic oxidation under ambient conditions, 2-chloroethyl ethyl sulfide, Co-catalysis by copper. Decontamination, Effect of ligands, Gold complexes. Mustard gas, Perfluorinated solvents. Solvent effect. Sulfoxide, Thioether... 

Catalysis for selective aerobic oxidation under ambient conditions. Thioether sulfoxidation catalyzed by gold complexes 227... 

Gold(I) complexes with P,S (or Se) donor ligands are in many cases derived of phosphine sulfides or selenides as [Au2(PPh2CH2PPh2Se)2](C104)2,3140 and [Au(PPh2CH2PPh2Se)2]+ (595),1403,3141 [Au2(PPh3)2(p-SPPh2Py)](BF4)2,1427 or phosphine thioethers such as... 

Similar SCS-Pd(II) complexes have also been used to prepare isolated nanometer-sized objects within a decanethiol self assembled monolayer on gold [88]. In this chemistry, the thioether derivative of a pyridine complex of the SCS-Pd(ll) complex 22 was first prepared and immobilized on gold as part of a self assembled monolayer. Then the much better phosphine ligand... 

Shaw, J. L., Wolowska, J., Collison, D., etal., Redox non-innocence of thioether macrocycles Elucidation of the electronic structures of mononuclear complexes of gold (II) and silver(II). J Am. Chem. Soc. 2006, 128, 13827-13839. 

Gold compounds, especially Au(III) complexes, are toxic to plants, animals and humans. In mammals, Au(III) is rapidly and readily reduced to Au(I) by possible reduction with protein disulfides, thiols, and thioethers. It is considered that the increased toxicity of Au(III) compounds compared with Au(I) compounds may be related to the additional damage caused by the strong oxidizing ability of Au (III) (Shaw 1991). 

The vibrational spectra and NMR spectra of many thioether complexes have been reported,and the molecular structure of [ClAuS(Ph)CH2CH2S(Ph)Auai has been determined. This molecule packs so that there are short intermolecular Au —Au contacts, between the otherwise linear gold(I) centres. The stability constants for formation of [AuClL] follow the series L = Me2Te > Me2Se > Mc2S. ... 

REDOX-STRUCTURAL CORRELATIONS IN METAL THIOETHER MACROCYCUC COMPLEXES THE STABILISATION OF MONONUCLEAR SILVER(II) and GOLD(n)... 

Redox-Structural Correlations in Metal Thioether Mactocyclic Complexes The Stabilisation of Mononuclear Silver(ll) and Gold(ll)... 

The previously mentioned thioether-based precursor complexes are used as starting materials however, instead of a carbene, an isonitrile is first coordinated to the gold atom. After this the resulting isonitrile complex, often still in situ, is further reacted with a secondary amine to form the desired carbene ligand (see Scheme 9.5). 

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