Titlebook: Basic Principles and Techniques of Molecular Quantum Mechanics; Ralph E. Christoffersen Textbook 1989 Springer-Verlag New York Inc. 1989 P

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Angular Momentum,, is associated with the measurement of angular momentum. In particular, the allowed states of orbital angular momentum are quantized at the microscopic level, in sharp contrast to the corresponding classical analog. Also, a new kind of angular momentum, associated with the intrinsic spin of particl

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The Hydrogen Atom, Rigid Rotor, and the H 2 + Molecule,s. As a first example, we shall examine the hydrogen atom and hydrogen-like atoms. It should be noted that the hydrogen atom is not only an important historical contribution to theoretical chemistry. As we shall see later, a substantial number of the qualitative and quantitative concepts that are us

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The Molecular Hamiltonian, the quantum mechanical Hamiltonian for a time-independent, field-free, conservative system in which relativistic effects are ignored. Although such a Hamiltonian is indeed a restricted one compared to the circumstances found in many experiments, use of it has allowed a number of important principle

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Approximation Methods for Stationary States,ough these applications were varied, there is one common characteristic shared by all of them. In each case, the Schrödinger equation could be solved exactly for the eigenvalues and associated eigenfunctions. If this were possible for all problems of interest to chemists, our insight into the nature

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0172-6323 chemical thermody­ namics are well represented by many excellent texts, and new or revised editions are published sufficiently often to keep up with progress in research. However, some areas of chemistry, especially many of those taught at the graduate level, suffer from a real lack of up-to-date t