Gold complexes dithiocarbamates

Alkene complexes Alkynyl complexes Ammine complexes Aqueous chemistry Arsine complexes Auranofin Auride ion Aurophilicity Binary compounds Bond lengths acetylacetonate complex alkyls and aryls ammine complexes carboxylates cyanide complexes dialkyl sulphide complexes dithiocarbamates to gold... 

Another example of an eight-membered metallocycle containing Au(II) centers is the dithiocarbamate complex (9) (20), obtained from the gold(I) dithiocarbamate complex (8) with halogens or pseudohalogens at -78° in C. However, these compounds disproportionate to form mixed-valence salts (10). It was shown that the vCs band of the coordinated dithiocarbamate is sensitive to the oxidation state of the gold, increasing in the order 1495, 1523, and 1547 cm-1 for the Au(I), Au(II), and Au(III) complexes, respectively (20). 

Van Attekum and Trooster [11] studied the X-ray induced decomposition of gold(III) dithiocarbamate complexes, using XPS. Unusually thin crystals of the reactant were prepared by vacuum sublimation or by evaporation of a solution. 

There are also two smaller reduction waves at more positive potentials. Similar cyclic voltammograms displaying three cathodic reduction peaks and two anodic oxidation peaks were obtained for the other complexes in this series. The main reduction peak for each gold complex is similar to the peak obtained from the polarographic study (see Table 4, values labeled c). The nonintegral n values and the complex CVs were attributed to dissociation of the dithiocarbamate ligand upon reduction of Aum(dtc)3 to [Au ldtchl2, followed by reaction of free dtc with the mercury electrode (see Scheme 1). 

NSC, Thiocyanate, gold complex, 26 90 NS2C5H11, Dithiocarbamic acid, diethyl-, molybdenum complex, 28 145 NSiC,H , Ethanamine, 1,1-dimethyl-A -(trimethylsilyl)-, 27 327 NSi2C4H , Silanamine, 1,1,1-trimethyl- -(trimethylsilyl)-, ytterbium complex, 27 148... 

Gold complexes also find a range of potential applications. A monolayer of adsorbed dibutyldithiocarbamate can be generated on a gold electrode at 0.5 V, which is displaced as the thiuram disulfide upon exposure to hydroxide (1836). Ferrocenyl-substituted dithiocarbamates (Fig. 254) have also proved useful for the modification of gold and platinum microelectrodes and a monolayer of the redox active ferrocene centers is generated (1837). 

AuCl3(tht) [129], AuX3[S(benzyl)2)2] (X = Cl, Br) [130] and AuC13 (thian-threne). Various dithiocarbamates and dithiolene complexes have been made, some by oxidation of gold(I) complexes (Figure 4.26). 

Bardaji, M Laguna, A., Laguna, M. and Merchan, F. (1994) Methyl dithiocarbamate gold(l) and gold(lll) complexes. Synthesis and reactivity with amines. Inorganica Chimica Acta, 215 (1-2), 215-218. 

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