Christopher Kelk Ingold

Sir Christopher Kelk Ingold was a British chemist based in Leeds and London. His groundbreaking work in the 1920s and 1930s on reaction mechanisms and the electronic structure of organic compounds was responsible for the introduction into mainstream chemistry of concepts such as nucleophile, electrophile, inductive and resonance effects, and such descriptors as SN1, SN2, E1, and E2. He also was a co-author of the Cahn–Ingold–Prelog priority rules. Ingold is regarded as one of the chief pioneers of physical organic chemistry.

28 October 1893

Born on the same birth day (28 October): Alan Clarke • Ashok Chavan • Devin Ebanks • Devon Murray • Don Iverson • Erasmus • Howard Blake • Jimmy McRae • John Chamberlain (journalist) • John Connell (actor) • Landon Curt Noll • Michael Noakes • Susan Harris • Terrell Davis • Toshio Masuda (composer) • Velimir Khlebnikov

Born in the same month (October 1893): Alice Dalgliesh • Carol II of Romania • George Ohsawa • Leroy Shield • Lillian Gish • Lois Lenski • Meghnad Saha • Miloš Crnjanski • Mário de Andrade • Sidney Holland