LIGAND SUBSTITUTION-REACTIONS OF TETRACHLOROBIS(TRIPHENYLPHOSPHINE)TECHNETIUM(IV)

The synthesis and characterization of tetrachlorobis (dimethyl sulfoxide)technetium(IV), tetrachlorobis (pyridine)technetium(IV), trichlorotris(pyridine)- technetium(III), trichlorotris(4-methylpyridine)technetium(III), and trichlorotris(3,5-dimethylpyridine)- technetium(III) are described, as well as the reaction of tetrachlorobis(triphenylphosphine)technetium(IV) with acetonitrile. Fast atom bombardment mass spectrometry, proton nuclear magnetic resonance, and cyclic voltammetry studies of the new complexes are reported. The Tc(IV) and Tc(III) species are paramagnetic, but the latter give well-resolved contact-shifted 1H NMR spectra. © 1990.