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DFT****£¬suggesting that the compound 2 is more stable than compound 1. The present results show that the transformation from compound 2 to 3 is endothermic process, which is consistent with the experimental observations and indicate that the enthalpic factor may be the driving force of such transformation. However, entropic and kinetic factors contribute to a large extent in the transformation processes from compound 3 to 2.

[ Last edited by csfn on 2010-1-26 at 10:12 ]
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