Hexamolybdates

Hexamolybdates are a class of polyoxometalate anions with the general formula [Mo6O19]2-. These anions are characterized by a central core of six molybdenum atoms octahedrally coordinated to oxygen atoms, forming a discrete, cage-like structure. They are derived from molybdic acid and are typically encountered as salts with various cations. The structure of the hexamolybdate anion is well-defined and has been extensively studied using techniques such as X-ray crystallography and spectroscopy. Hexamolybdates exhibit interesting chemical properties due to the presence of multiple molybdenum centers in a high oxidation state. They can participate in redox reactions, act as catalysts, and form complexes with other metal ions. Their synthesis often involves the controlled precipitation of alkali metal hexamolybdates from aqueous solutions of molybdates under specific pH conditions. These compounds find applications in areas such as electrochemistry, catalysis, and materials science, owing to their unique structural and electronic characteristics. Research continues to explore their potential in various chemical transformations and functional materials.