Chemistry of technetium nitrido complexes

The Tc≡N bond is remarkably stable to hydrolysis and technetium nitrido complexes have been prepared in the +5, +6 and +7 oxidation states. Useful starting materials are R[TcNCl4], Cs2[TcNCl5] and nitridotechnetic(VI) acid. Solutions of nitridotechnetic(VI) acid in p-toluenesulphonic acid are of particular interest since these contain a cationic species which is probably a dimeric oxo-bridge technetium nitridoaqua ion. Reaction of Cs2[TcNCl5] with hydrogen peroxide gives Cs[TcN(O2)2Cl], the first example of a transition metal nitridoperoxo complex. (author)