Dimeric dithiocarbamato

The literature dealing with EPR studies of transition metal dithiocarbamato complexes is extensive. Interesting results were obtained about the interaction of copper compounds with various solvents 165,166,167,168) and about dimer formation of Cu(R2frozen solutions, 133,169) whereas extensive EPR studies about other transition metal dithiocarbamato complexes are reported as well 170,5,171, 37). As the measurements of the planar systems are most suitable for comparison with theoretical studies, we shall pay attention to the results of these investigations on Cu(II), Ag(II) and Au(II). 

The conversion of functionalized arenes as represented by the general formula 97, into isothiazolium compounds (99) has been achieved by the sequence shown in Scheme 117.180 From a synthetic viewpoint, transformation of cyclopalladated products into thiocyanate derivatives is more efficiently achieved using monomeric dithiocarbamato complexes (98) rather than dimeric compounds. The generation of analogous dithiolylium perchlorates by a related procedure is described later (see Section IV,H). 

Figure 20 A rare example of a lone pair- 7r(TeS2C) interaction, (a) Chemical structure of bromido-bis (dimethyl-dithiocarbamato)-4-methoxyphenyl-tellurium(IV) and (b) dimeric aggregate based on lone pair- jr(TeS2C) interactions (pnrple dashed lines). The molecule crystallizes as a dichloromethane solvent which is not illustrated for reasons of clarity.

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