Dithiolate ligand

Several complexes of iron with the 1,1-ethenedithiolates have been isolated. These are mainly tris-Fe(III) complexes with the 1,1-dicyano-2,2-ethylenedithiolate ligand (1). Recently, however, Coucouvanis et al. (262) synthesized a new 1,1-dithiolate ligand (XVIII) from the reac-... 

Certain classes of ligand deserve special mention as their Mo02+ complexes have received particular attention. The 1,1-dithiolate ligands, especially A,A-disubstituted dithiocarbamates, have been very thoroughly studied.131-133 Evidence for the existence of the dithiophosphate complex Mo02[S2P(OEt)2]2 in solution has been obtained.95 This and a number of other dithiolate complexes may be unstable toward internal redox in which the S ligand serves as the reductant to produce a lower valent Mo—S complex. 

The synthesis of a large number of alkyl-sulfonyl 1,1-dithiolate ligands has been reported by the reaction between RS02CH2R and CS2 in DMSO in the presence of NaH as a base (399). The coordination chemistry of these new ligands, RS02 R C CS2", to the knowledge of the present author, has not been explored. 

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