JELLINEK, KARL (1882–1955), German physical chemist; born in Vienna. In 1908, Jellinek joined the Technische Hochschule at Danzig; he was appointed professor of physical chemistry and director of the Institute in 1922. In 1937 the Nazis forced him out and he spent the rest of his life in London. His field of research included nitric oxide, ammonia synthesis, electrochemistry, the Nernst heat theorem, and the vapor pressure of salts. He wrote many books, including Verstaendliche Elemente der Wellenmechanik (2 vols., 1950–51).