Technetium, dithiocarbamate complexes

Finally two reactions of technetium complexes which show clean first-order kinetics, despite ill-defined structures and unknown oxidation states. The first involves the dissociation or solvolysis of the technetium-spiperone dithiocarbamate complex (spiperone, (24), is involved in brain dopamine receptor behavior)/ ... 

Prior to 1980, dithiocarbamate complexes of technetium were unknown. However, over the past 20 years considerable developments have been made, driven mainly by the application of technetium(V) nitride complexes in radiopharmaceuticals. More recently, dithiocarbamate chemistry of technetimn has been more fully explored with diphosphine, carbonyl, oxo, imido, and other ligand combinations. 

Figure 135. Exan jles of seven-coordinate technetium(III) tris(dithiocarbamate) complexes.

Crystallographic studies of ionic bis(dithiocarbamate) complexes aU reveal a distorted square-planar gold(lll) center (421, 422,1 825). In [Au(S2CNEt2)2] [TcNCLt], an interesting secondary interaction is seen, two anions and one cation assembling via coordination of a sulfur to the vacant coordination site at the technetium center [Tc-- S 3.451(5)-3.568(5) A] (Fig. 250), the second cation remains uncoordinated (421). 

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