Abstract
The optimization of equilibrium geometries and transition states by molecular orbital methods is discussed from a practical point of view. Most of the efficient geometry optimization methods rely on analytical energy gradients and quasi-Newton algorithms. For any optimization method, there are three areas of input that directly affect the behavior of the optimization: (a) the choice of internal coordinates, (b) the starting geometry and (c) the initial estimate of the Hessian. A number of topics related to these three areas are discussed with the aim of improving the performance of optimizations; these include symmetry, dummy atoms, avoiding coordinate redundancy, overcoming strong coupling among coordinates, conversion between coordinate systems, testing stationary points and what to do when optimizations fail.
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Schlege, H.B. (1989). Some Practical Suggestions for Optimizing Geometries and Locating Transition States. In: Beltrán, J., Csizmadia, I.G. (eds) New Theoretical Concepts for Understanding Organic Reactions. NATO ASI Series, vol 267. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2313-3_2
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DOI: https://doi.org/10.1007/978-94-009-2313-3_2
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