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°®ÓëÓêÏÂ(½ð±Ò+1): £¡£¡~~ 2011-08-09 16:30:22
baiyuefei(½ð±Ò+25): лл¡£ 2011-08-09 19:32:43
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baiyuefei(½ð±Ò+25): лл¡£ 2011-08-09 19:32:43
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The conformations of the investigated molecules are mainly affected by the hydrogen bond and the electrostatic interaction. Both the intramolecular and the intermolecular electrostatic interaction exist in the crystals, while the intermolecular interaction disappears and the intramolecular interaction becomes stronger in the optimized single molecules. The change of the intermolecular interaction from crystals to single molecules should be attributed to the different geometry described above. The difference between the computing value and the experimental value could be a result of the anharmonicity and the general tendency that the force constant of the exact equilibrium geometry is overestimated by quantum chemical methods. ½ö¹©²Î¿¼¡£ |
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