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Christopher Longuet-Higgins

H. Christopher Longuet-Higgins
Born (1923-04-11)11 April 1923
Lenham, Kent, England
Died 27 March 2004(2004-03-27) (aged 80)
Institutions King's College London
University of Chicago
University of Manchester
University of Cambridge
University of Edinburgh
University of Sussex
Alma mater University of Oxford
Thesis Some problems in theoretical chemistry by the method of molecular orbitals (1947)
Doctoral advisor Charles Coulson
Doctoral students Peter Higgs
Geoffrey Hinton
Mark Steedman
Mark Child
Anthony Stone
David Willshaw, Mark Agnostini, David Hinton, John Murrell, Lionel Salem, Graeme Ritchie, Philip Bunker
Notable awards Fellow of the Royal Society
Naylor Prize and Lectureship (1981)

Hugh Christopher Longuet-Higgins FRS (April 11, 1923 – March 27, 2004) was both a theoretical chemist and a cognitive scientist. He was the older brother of Michael S. Longuet-Higgins.

Longuet-Higgins was born on 11 April 1923 in Lenham, Kent, England.

He was educated at The Pilgrims' School, Winchester, and Winchester College. In 1941, he won a scholarship to Balliol College, Oxford. He read chemistry, but also took Part I of a degree in Music. He was a Balliol organ scholar.

As an undergraduate he proposed the correct structure of the chemical compound diborane (B2H6), which was then unknown because it turned out to be different from structures in contemporary chemical valence theory. This was published with his tutor, R. P. Bell. He completed a DPhil at the University of Oxford under the supervision of Charles Coulson. This was followed by post-doctoral work at the University of Chicago and the University of Manchester.

In 1952, he was appointed Professor of Theoretical Physics at King's College, London, and in 1954 became John Humphrey Plummer Professor of Theoretical Chemistry at Cambridge, and a Fellow of Corpus Christi College. He became interested in the brain and the new field of artificial intelligence. As a consequence, in 1967, he made a major change in his career by moving to the University of Edinburgh to co-found the Department of Machine intelligence and perception, with Richard Gregory and Donald Michie.


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