Derivatives of Technetium Carbonyl. Synthesis and Properties of the Carbonyl Halides and the Pentacarbonyl Hydride

BS>The carbonyl halides of technetium, Tc(CO)/sub 5/X and ution of the carbonyl in carbon tetrachloride at room temperature. These reaction are analogous top those found for thge carbonyls of manganese and rhenium. On the other hand, only traces of a volatile carbonyl hydride of technetium can be isolated from a reaction sequence known to afford the pentacarbonyl hydrides of manganese and rhenium in good yields (from the respective carbonyls). Recovery of technetium from reaction residues as the dioxide and direct conversion of the latter to the carbonyl are reported. The new derivatives were characterized, and their infrared absorption spectra in the carbonyl region compared with improved spectra for the analogous compounds of manganese and rhenium. (auth)