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Article: Valence bond theory

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Linus Pauling published in 1931 his landmark paper on valence bond theory: "On the Nature of the Chemical Bond". Building on this article, Pauling's 1939 textbook: On the Nature of the Chemical Bond would become what some have called the bible of modern chemistry. This book helped experimental chemists to understand the impact of quantum theory on chemistry. However, the later edition in 1959 failed to adequately address the problems that appeared to be better understood by molecular orbital theory. The impact of valence theory declined during the 1960s and 1970s as molecular orbital theory grew in usefulness as it was implemented in large digital computer programs. Since the 1980s, the more difficult problems, of implementing valence bond theory into computer programs, have been solved largely, and valence bond theory has seen a resurgence.

Talk from VBT article:
"After the war, molecular orbital theory grew in strength because it was easier to program to get quantitative results and the qualitative ideas grew along side. Recently VB theory has become more computationally easier so its popularity is growing again."

"The Heitler-London paper is in German and I have only read a translation. However it is discussed all over the place in chemistry texts and is often the main thing discussed in physics texts under "molecules"."

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 * Textbooks
 * Literature reviews for the citations/references I want to add.