Metallocene refers to a class of chemical compounds that consist of a metal sandwiched between two cyclopentadienyl anions. These compounds are notable for their unique structure, which allows for a variety of metal centers, including titanium, zirconium, and iron. Metallocenes are often used as catalysts in polymerization processes, leading to the production of high-performance materials. The most well-known metallocene is ferrocene, which features iron as its central metal. Metallocenes exhibit interesting properties, such as thermal stability and electrical conductivity, making them valuable in fields like materials science and organic electronics. Their versatility continues to inspire research and development in various applications.