Gold ll Complexes

Laguna, A., Laguna, M., Jimenez, J., Lahoz, F. and Olmos, E. (1992) Asymmetric monocationic or neutral gold(ll) complexes X-ray crystal stmcture of [(C6F5)Au(CH2PPh2CH2)2AuPPh3]... 

Apparent Gold(ll) Complexes 55.122 Binuclear Gold(II) Complexes... 

Dinuclear gold(l) and gold(ll) complexes of pyridine-2-thiolate, 27, 28a and 28b, were studied by cyclic voltammetry at a Pt working electrode in CH2Cl2 . The dinuclear gold(l) complex, 27, has an irreversible, extended oxidation process at +0.53 V vs SCE. No reduction wave was observed out to —1.8 V. The cychc voltammograms for the dinuclear gold(ll) complexes show irreversible reduction waves at —0.44 V (28a) and —0.43 V (28b). After reduction, the return oxidation scan shows an irreversible oxidation process at +0.55 V, indicative of the presence of 27. 

Figure 1.13 Synthesis of gold(ll) amidinate complexes by oxidative-addition to the dinuclear gold(l) amidinate.

PentcifluorophenYlgold(ll) Derivatives 157 Table 3.14 Dinuclear Gold(ll) AU2 complexes with at least one CgFs group. 

Coco, S., Cordovdla, C., Donnio, B., Espinet, P., Garda-Casas, M.J. and Gudlon, D. (2008) Self-Organization of Dendritic Supermolecules, Based on Isocyanide-Gold(I), -Copper(l), -Palladium(II), and -Platinum(ll) Complexes, into Micellar Cubic Mesophases. Chemistry - A European Journal, 14, 3544-3552. 

The Au(ll) oxidation state was also observed in cyclometalated gold dimers [386, 387] and in gold complexes of hA(diphenylphosphino)amine [388]. The specific feature of these Au(ll) complexes is that their 6 - A q relation is located midway between that of Au(l) and Au(lll) complexes. 

Arylmercury compounds are also often used as starting materials for the synthesis of palladium(ll) complexes. These reactions, whose reagents and products are compiled in Table 3, typically involve the use of chloromercurio derivatives with palladium chloride complexes (entries a-d). 93>95>179-i8i Similar procedures have been applied to the synthesis of ruthenium(ll) and gold(m) complexes (entries e and f).181,182... 

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... 

Gold(l) complexes of alkenes and alkynes appear to play an important role as intermediates of the gold(l)-catalyzed addition of water, alcohols, carboxylic acids, or amines to these substrates. The elfect of this 7r-complexation (22) is superior to the performance of mercury(ll) in this type of reactions. " In a similar way, gold(III) salts have found applications in homogeneous catalysis. ... 

In addition to the complexes containing a single Au(ll) center, a number of binuclear gold(II) complexes have been synthesized by... 

D. Complexes of Gold(l), Gold(ll) and Gold(lll) with Ylide Ligands... 

Smectic mesophases have been claimed for other gold(l) 159 carbene complexes based on 1,3-dialkylbenzimi-dazol-2-ylidene and l,3-dialkylimidazol-2-ylidene. However, examination of the X-ray diffraction data in combination with the large clearing enthalpies suggest that these materials are highly ordered and may be better described as crystals. Related Pd(ll) complexes have been described 88. ... 

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