Robert Mulliken

Robert Mulliken was a pioneer in the development of molecular orbital theory, which provides a more accurate description of chemical bonding than valence bond theory. His work in quantum chemistry and spectroscopy allowed for a deeper understanding of the electronic structure of molecules. By applying quantum mechanics to chemical problems, he helped transform theoretical chemistry into a predictive and quantitative discipline. His contributions remain essential for modern computational chemistry, which relies on molecular orbital calculations to model chemical behavior in drug design and materials science.