1965 Robert Burns Woodward and Roald Hoffmann propose the Woodward–Hoffmann rules, which use the symmetry of molecular orbitals to explain the stereochemistry of chemical reactions.
1965 Robert Burns Woodward și Roald Hoffmann propun regulile Woodward-Hoffmann, care folosesc simetria orbitalilor moleculari pentru a explica stereochimia reacțiilor chimice.