Sir Cyril Norman Hinshelwood was a British physical chemist and expert in chemical kinetics. His work in reaction mechanisms earned the 1956 Nobel Prize in chemistry. The Nobel Prize in Chemistry 1956, announced November 1, 1956. Sir Cyril Hinshelwood and Nikolay Semenov, “for their researches into the mechanism of chemical reactions”. Sir Cyril Hinshelwood: born 1897, London, United Kingdom. Nikolay Semenov: born 1896, Saratov, Russia. Wiki link Wiki link Data: the Nobel Foundation (CC0).