期刊
CHEMICAL PHYSICS LETTERS
卷 466, 期 1-3, 页码 11-15出版社
ELSEVIER
DOI: 10.1016/j.cplett.2008.10.017
关键词
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资金
- EADS Corporate Foundation
- Institut du Developpement et des Ressources en Informatique Scientifique (IDRIS)
Equilibrium geometries, relative energies and thermodynamic properties of Si2H4 isomers have been obtained with the coupled cluster method (CCSD(T)) and aug-cc-pVXZ (X = 2-5) basis sets with next complete-basis-set extrapolations. Transition states between low-energy isomers were also computed. The global minimum structure corresponds to the trans-bent C-2h isomer and the monobridged C-1 isomer has been found to be almost isoenergetic to the silylsilylene C-s one. After including all necessary corrections, standard heats of formation of Si2H4 isomers are found to be equal to 66.0, 72.4, 73.0, 86.1 and 88.6 kcal/mol for the trans-bent C-2h disilene, monobridged C-1, silylsilylene C-s, dibridged trans C-2h and dibridged cis C-2v isomers, respectively. (C) 2008 Elsevier B. V. All rights reserved.
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