W2 Br4 O4

W2Br4O4 is a mixed-valence tungsten oxide halide compound containing tungsten, bromine, and oxygen—a rare inorganic semiconductor that falls within the broader family of transition metal oxides and halides. This is primarily a research material rather than an established commercial compound; it is of interest in materials science for exploring electronic structure, mixed oxidation state chemistry, and potential photocatalytic or electrochemical properties in tungsten-based systems. The inclusion of both halide and oxide ligands makes it structurally distinct from simpler tungsten oxides, positioning it as a candidate for fundamental studies rather than mature industrial deployment.