Methods in Computational Chemistry : Volume 1 Electron Correlation in Atoms and Molecules

Wilson, Stephen

ISBN 10: 1489919848 / ISBN 13: 9781489919847

Editore: Springer 2013-06, 2013

Riguardo questo articolo

Codice articolo 6666-IUK-9781489919847

Dati bibliografici

• Titolo: Methods in Computational Chemistry : Volume 1 Electron Correlation in Atoms and Molecules
• Editore: Springer 2013-06
• Data di pubblicazione: 2013
• Lingua: Inglese
• ISBN 10: 1489919848
• ISBN 13: 9781489919847
• Rilegatura: PF
• Condizione: New

Descrizione articolo

Riassunto

When, forty years ago, as a student of Charles Coulson in Oxford I began work in theoretical chemistry, I was provided with a Brunsviga calculator-a small mechanical device with a handle for propulsion, metal levers for setting the numbers, and a bell that rang to indicate overflow. What has since come to be known as computational chemistry was just beginning. There followed a long period in which the fundamental theory of the "golden age" (1925-1935) was extended and refined and in which the dreams of the early practitioners were gradually turned into hard arithmetic reality. As a still-computing survivor from the early postwar days now enjoying the benefits of unbelievably improved hardware, I am glad to contribute a foreword to this series and to have the opportunity of providing a little historical perspective. After the Brunsviga came the electromechanical machines of the late 1940s and early 1950s, and a great reduction in the burden of calculating molecular wavefunctions. We were now happy. At least for systems con­ taining a few electrons it was possible to make fully ab initio calculations, even though semiempirical models remained indispensable for most molecules of everyday interest. The 1950 papers of Hall and of Roothaan represented an important milestone along the road to larger-scale non­ empirical calculations, extending the prewar work of Hartree and Fock from many-electron atoms to many-electron molecules-and thus into "real chemistry.