Dimeric 1,1-dithiolate

From the reactions of sulfur and carbon disulfide with cyclic ketone-derived enamines (570-573) 3H-l,2-dithiole-3-thiones were obtained, whereas the addition of carbon disulfide to other enamines gave a-dithio-pyrones (574), through initial dimerization of the enamine. 

Bidentate dithiolate ligands afford complexes like Au(S2CNR2) (R = Et, Pr, Bu) and Au(S2PR2) (R = Pr), which have dimeric structures based on 8-membered rings with linear S—Au—S coordination and short Au-Au distances. These in turn are associated into chains (Figure 4.16) (Au-Au c. 3.0-3.4 A) [99],... 

The structure of [Mo3S4(dmit)3] (dmit=l,3-dithiole-2-thione-4,5-dithiolate) represents one of the rare examples of M3S4 clusters where each metal atom appears as pentacoordinate instead of its more common type-I structure octahedral environment [39]. Complexes [M3Q4(dmit)3] (M = Mo, W Q = S, Se) degrade in air with an almost quantitative yield and afford a series of M(V) dimers of formula [M202(//-Q)2(dmit)2] where the oxygen atoms are in a syn configuration. 

Dimerized fatty acid thioesters (with a dithiol) in combination with fatty amines are sulfur-containing corrosion inhibitors [888]. The corrosion inhibitor solvent is preferably a hydrocarbon. 

The palladium-catalyzed formation of sulfides can generate polyphenylene sulfide from a dithiol and a dibromoarene, or from 4-bromobenzenethiol (Equation (38)).17 In 1984 Asahi Glass obtained patents for the formation of this polymer in the presence of palladium and nickel catalysts.125,126 In addition, Gingras reported palladium-catalyzed couplings of aryl halides and thiols to form discrete phenylene sulfide oligomers.127,128 A number of polyphenylene sulfide wires, ranging from dimeric to pentameric structures, were prepared by the palladium coupling, albeit in modest yields ... 

Dithiolate ligands form stable anionic square pyramidal complexes with the Re03+ core [10]. This has been exploited in the dimer-captosuccinic acid complexes of 186Re and 188Re (vide infra), and in the use of the cyclic anhydride of dimercaptosuccinic acid as a bifunctional chelator for bioconjugate formation. The anhydride, in protected form such as 38, is reacted with antibody or other protein to form an amide or... 

Ethylene and propylene episulfides polymerize in THE at 0-70°C in the presence of sodium naphthalene, and (importantly) the polymer contains no naphthalene residues. The reaction involves one-electron transfer followed by dimerization of the resulting radical to give a dithiolate ion. This ion then polymerizes an episulfide by anionic mechanism (Boileau et al. 1967 Scheme 7.14). 

If the addition is carried out in the normal sense, some dimer of the thioketene CHjC(SiMe3)=C=S (a dithiole derivative) is formed. 

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