Technetium(IV) bromide
Technetium(IV) bromide, also known as technetium tetrabromide, is an inorganic chemical compound with the formula TcBr4. It is a binary compound consisting of technetium in the +4 oxidation state and bromide ions.
Technetium(IV) bromide is a dark red-brown solid. It is a relatively unstable compound, prone to decomposition upon heating or exposure to moisture. Due to the radioactivity of technetium (specifically, 99Tc, the most common isotope), TcBr4 must be handled with appropriate safety precautions.
While the exact structure of solid TcBr4 isn't fully characterized with certainty, it is believed to adopt a polymeric structure similar to other transition metal tetrahalides. This polymeric structure likely involves bridging bromide ligands between technetium centers.
Technetium(IV) bromide can be synthesized by the direct reaction of technetium metal with bromine gas at elevated temperatures. It can also be formed by the reaction of technetium oxides with hydrobromic acid.
Due to the radioactivity and instability of technetium and its compounds, technetium(IV) bromide has limited practical applications. It is primarily used in research settings to study the chemistry of technetium.