John Pople

Sir John Anthony Pople (October 31st 1925 - March 15th 2004) is a theorist of the Chimie.

Pople is born with Burnham-one-Sea in the Somerset, it makes its secondary studies with the Bristol Grammar School . It obtains its Bachelor in 1946 and a Doctorat in Mathématiques in 1951 with the Université of Cambridge. The thesis of Pople relates to a subject generally considered as Chimie: the molecular connection of the Water. Pople is considered rather as a mathematician but it is most frequently classified as chemist. He moves with the the United States at the beginning of the Années 1960 and remains there for the remainder of his life although he preserves nationality Britannique.

First major contribution is a theory of approximation of calculation of the molecular orbital of the connections pi in 1953. This theory, developed independently by Rudolph Pariser and Robert Parr, is known maintaining under the name of Méthode Pariser-Parr-Pople or PPP. It off develops then the method Complete Neglect Differential Overlap (CNDO) in 1965 and the method Intermediate Neglect off Differential Overlap (INDO) to approximate calculations of orbital of three-dimensional molecules. It opens the way with other more sophisticated methods, starting from the principles first, which uses the clean vectors of functional Espace to model the Fonction of wave of orbital atomic.

In 1986 it leaves the Université Carnegie Mellon to Pittsburgh for the Université Northwestern to Evanston.

Pople receives the Nobel Prize of chemistry in 1998. He becomes member of the Royal Society in 1961, receives the Prix Wolf in 1992, the Médaille Copley in 2002 and is made knight in 2003.

External bonds

Prizes winner of the Nobel Prize of chemistry 1998
Autobiography on the site of the foundation Nobel
the origin of theory PPP by John Pople
Obituary '' The Guardian ''

Zh-min-nan: John Pople

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