Albert Cotton

Albert Cotton discovered the first metal-to-metal quadruple bond in 1964. He found this unique bonding structure while studying the [Re2Cl8]2- ion in a compound.

Albert Cotton spent much of his distinguished career as an inorganic chemist at Texas A&M University. He joined the faculty there to establish one of the premier inorganic chemistry research groups in the world.

A metal-metal quadruple bond consists of one sigma bond, two pi bonds, and one delta bond between two metal atoms. Cotton's identification of the delta bond fundamentally changed how scientists understood transition-metal bonding.

Besides his work on multiple bonds, Cotton made foundational contributions to transition-metal cluster chemistry. He published highly influential textbooks that became standard reading for inorganic chemistry students worldwide.