Metal compounds refer to chemical compounds that contain a metal element bonded to one or more non-metal elements. These compounds are widely used in various industries, including pharmaceuticals, electronics, and catalysis. Research in this area focuses on studying the properties and reactivity of metal compounds, as well as developing new compounds with specific properties for different applications. Some common types of metal compounds include metal oxides, metal halides, metal sulfides, and metal complexes. Studying metal compounds is important for advancing materials science, developing new technologies, and understanding the role of metals in biological systems.