## Abstract We present the new release of the ORAC engine (Procacci et al., Comput Chem 1997, **18**, 1834), a FORTRAN suite to simulate complex biosystems at the atomistic level. The previous release of the ORAC code included multiple time steps integration, smooth particle mesh Ewald method, cons
โฆ LIBER โฆ
The implementation of constraints in molecular mechanics to explore potential energy surfaces
โ Scribed by B. van de Graaf; J. M. A. Baas
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 149 KB
- Volume
- 99
- Category
- Article
- ISSN
- 0165-0513
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โฆ Synopsis
Abstract
The implementation of a Lagrange multiplier method in a molecular mechanics computer program is discussed. This gives a very efficient method to apply constraints in empirical force field calculations for the exploration of potential energy surfaces.
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We discuss the symmetries, the behavior of the diabatic energy curves, as well as the static aspects of vibronic interaction for diatomic molecules in the presence of a strong magnetic field. Our central subject of investigation is the topology of the adiabatic electronic potential energy surfaces o