In polyatomic molecules, the Wigner-van Neumann non-crossmg rule is generally relaxed because of the cxistcncc of more than a single nuclear coordinate. Potential energy surfaces may or may not intersect. There is an interesting class of states where an intersection cannot occur if only the dominant
Finding saddles on multidimensional potential surfaces
β Scribed by R.S. Berry; Heidi L. Davis; Thomas L. Beck
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 474 KB
- Volume
- 147
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
A method is presented which directly locates saddle points on multidimensionl potential energy surfaces. The method is simple to implement and can be used whenever steepest decent quenches are applicable. As an example, it is applied to a molecular dynamics study of the low-energy isomerizations of Ar,.
π SIMILAR VOLUMES
The multidimensional potential energy surface for a soluble analog of a chiral phase is computed with MM2 and MNDO. Minimum energy conformations are located. The minimum energy reaction pathway between these forms is located, and the templating ability of these phases is described.
A simple extension of the Newton-Raphson method is proposed that approximately accounts for anharmonicity in bond-stretching coordinates. By modeling each bonded distance in a polyatomic molecule as a Morse oscillator with no anharmonic stretch-stretch or stretch-bend coupling, a multiplicative corr
using the restricted HartreeαFock RHF method and the STO-3G basis set. Forty-nine minima and saddle points of different indices were found. At least seven stationary points representing bonded structures were detected in addition to those located using another search algorithm on the same level of t