Titlebook: Elements of Quantum Chemistry; Rudolf Zahradník,Rudolf Polák Book 1980 Rudolf Zahradník, Rudolf Polák 1980 bonding.chemical bond.photochem

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e computer programmes. Even after World War II the rule of three was considered to be sufficient mathematical knowledge for chemists and the short course of "higher mathematics" at technical universities was the test most feared by chemistry students. However, even then some en­ visaged the theoreti

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Managing Complications in Glaucoma Surgerygher mathematics” at technical universities was the test most feared by chemistry students. However, even then some envisaged the theoretical derivation of information on the properties of molecules from knowledge of the bonding of the component atoms.

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Basic Approximations in the Theory of the Chemical Bond,ing for chemists must be simplified by conversion into .. The mere fact that, as a rule, an isolated system is treated (an atom, a molecule, a solid or a system of several partial subsystems) is a kind of abstraction, as the influence of the surrounding medium, for example the influence of a solvent, is frequently ignored.

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Many-Electron Atoms, system. The two-electron part of the operator can be simplified (cf. Section 5.5) if the .-th electron is assumed to be exposed to the effect of an averaged potential of all the remaining electrons: .. then depends only on ..:

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Examples of the Study of Polyatomic Molecules,ng the limited region of application of the individual versions of the SCF method. It is evident, however, that there is a great number of problems in chemistry that can be successfully studied using simple empirical methods considering all the valence electrons or only the π electrons.

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A Brief Comment on the Development of the Theory of the Chemical Bond,bly to the rationalization of organic and inorganic chemistry (Robinson, Ingold, Arndt, Eistert). The work carried out by their predecessors (Kekulé, Cooper, Butlerov, Werner, and in spatial structure Le Bel and van’t Hoff) is of essential importance.

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Weak Interactions,ot as rapid, as the distance decreases (it is roughly proportional to its sixth power). This has important consequences: whereas repulsive forces practically cease to be effective at distances greater than the length of chemical bonds, attractive forces are not negligible even at distances of about