Sulfurdiimine metal complexes

Sulfurdiimines RN=S=NR and thionitrites RN=S=0 (R = alkyl, aryl) have been relatively little investigated as ligands in metal complexes. This lack of attention has been little deserved as both types of ligands have interesting ambident coordination properties, since they may bind via N, S, O, the 7t-N=S or jr-S=0 bond for example. They may be compared with allenes and naturally also with the isostructural and the isoelectronic sulfur dioxide 0=S—O.13 We will first discuss some relevant data concerning RNSNR and RNSO and subsequently the properties of the metal complexes. 

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