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- W1595036756 endingPage "201" @default.
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- W1595036756 abstract "This chapter focuses on the pi-electron approximation. The appropriate basis for a discussion of the pi-electron approximation is in terms of quantum mechanics. Pi-electron systems represent the most fruitful class of molecular systems to which quantum mechanics can be applied using a semi empirical approach. There are countless numbers of them, and pi-electron can be classified by forming homologous series where many variables can be suppressed, thus these electrons lend themselves well to theoretical approximation methods. The quantum mechanical approach to them can be related to solid state physics as well as to atomic and molecular physics. The study of pi-electron systems constitutes an important part of the history of quantum chemistry. Any analysis which does not relate to that underlying structure cannot provide firm footing for any a priori predictions about chemical or physical behavior. Some attention is given to the pi-electron approximation on that basis and its essential features seem to be fairly well understood." @default.
- W1595036756 created "2016-06-24" @default.
- W1595036756 creator A5051484086 @default.
- W1595036756 date "1964-01-01" @default.
- W1595036756 modified "2023-09-24" @default.
- W1595036756 title "The Pi-Electron Approximation" @default.
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