SYNTHESIS AND CHARACTERIZATION OF NEUTRAL OXORHENIUM(V) AND NITRIDOTECHNETIUM(V) COMPLEXES WITH A TETRADENTATE N2S2 UNSATURATED LIGAND DERIVED FROM DITHIOCARBOXYLIC ACID

Neutral complexes of technetium(V) and rhenium(V) of the type TcN(L2) and ReO(L2)CI, where L2 corresponds to the dianionic form of the tetra dentate N2S2 ligand N,N'-ethylene bis(methyl 2-aminocyclopentane-1-dit hiocarboxylate) were prepared by substitution reaction on the starting materials (TcNCl2)-Tc-99(PPh(3))(2) and ReOCl3(PPh(3))(2), respective ly. The complexes were characterized by elemental analysis, IR, NMR sp ectroscopy and conductimetry. The molecular and crystal structure of t he nitrido complex TcN(L2) was determined by single-crystal X-ray diff raction technique (monoclinic P2(1)/c, a=13.380(6), b=9.945(2), c=15.8 39 Angstrom, beta=113.98(3)degrees). The electrochemical behaviour of the nitrido complex was investigated.