A theoretical investigation on optimal structures of ethane clusters (C2H6)n with n ≤ 25 and their building-up principle
✍ Scribed by Hiroshi Takeuchi
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 470 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0192-8651
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✦ Synopsis
Abstract
Geometry optimization of ethane clusters (C~2~H~6~)~n~ in the range of n ≤ 25 is carried out with a Morse potential. A heuristic method based on perturbations of geometries is used to locate global minima of the clusters. The following perturbations are carried out: (1) the molecule or group with the highest energy is moved to the interior of a cluster, (2) it is moved to stable positions on the surface of a cluster, and (3) orientations of one and two molecules are randomly modified. The geometry obtained after each perturbation is optimized by a quasi‐Newton method. The global minimum of the dimer is consistent with that previously reported. The putative global minima of the clusters with 3 ≤ n ≤ 25 are first proposed and their building‐up principle is discussed. © 2010 Wiley Periodicals, Inc. J Comput Chem, 2011