Nobel Prize

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English 13 October 1998 has awarded the 1998 Nobel Prize in Chemistry to Professor Walter Kohn, University of California at Santa Barbara, USA and, Professor John A. Pople, Northwestern University, Evanston, Illinois, USA (British citizen). The Laureates have each made pioneering contributions in developing methods that can be used for theoretical studies of the properties…

Presentation Speech by Professor Björn Roos of the , December 10, 1998. Translation of the Swedish text. Professor Björn Roos delivering the Presentation Speech for the 1998 Nobel Prize in Chemistry at the Stockholm Concert Hall. Photo: Hans Mehlin, Nobelprize.org   Your Majesties, Your Royal Highness, Ladies and Gentlemen, Man is fantastic. Through his studies…

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Swedish 13 oktober 1998 har utdelat 1998 års Nobelpris i kemi inom området kvantkemi till Walter Kohn, University of California at Santa Barbara, USA och John A. Pople, Northwestern University, Evanston, Illinois, USA (brittisk medborgare). Pristagarna har var för sig gjort banbrytande insatser för att utveckla metoder som kan användas för att teoretiskt studera molekylers…

  John A. Pople has developed computational methods in chemistry. These are based on different descriptions of the wave function in the Schrödinger equation. He has created a theoretical model chemistry in which a series of increasingly refined approximations systematically approaches the exact solution to the quantum-mechanical equations. In this way it has become possible…

  The mechanisms of chemical reactions can be studied with quantum-chemical methods. The Schrödinger equation gives an energy for each molecular structure. The energy curve for a given reaction path, which passes through different intermediate states (minima) and transition states (maxima), shows whether that particular mechanism is possible. The diagram shows possible mechanisms for how…