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2Â¥2008-11-12 19:33:59
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3Â¥2008-11-12 20:01:15
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4Â¥2008-11-13 10:06:19
lb1586551
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| If you want to find out the right transition state, you are of only necessity to change the initial guess. The other methods are only secondary. |
5Â¥2008-11-13 15:03:24
ÓÑ·ç
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6Â¥2008-11-17 16:00:38
lb1586551
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spur(½ð±Ò+2,VIP+0):^_^ Many thanks£¡£¡Welcome to emuch!
spur(½ð±Ò+2,VIP+0):^_^ Many thanks£¡£¡Welcome to emuch!
| I have to admit that there are several reasons that can lead to the difficulties of calculated transition state. First, due to the b3lyp/6-311++G(d.p), it is likely that you can not seek for the transition state for the specific reaction. I suggest that you may use other methods such as MP2, BHandHLYP and so on. Second, What is worse, it is of great possibility that there is no transition state existed. |
7Â¥2008-11-17 17:00:08
ÓÑ·ç
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|
thank you very much ! 1.i am trying to find the TS of such a reaction : H abstraction . CH4 +O2=CH3+HO2 and it is proved that a transtion state exists and somebody found it with b3lyp . 2.i am a rookie now .but i tried TS and qst2 .but it always ended with the errors i mentioned above . 3.i tried changing or adding key words ,and chang ing the initial geom,but it did not work either .this makes me very frustrated and a little anxious . so ,i am here to ask all you for help ! thank you all ! [ Last edited by ÓÑ·ç on 2008-11-17 at 19:41 ] |
8Â¥2008-11-17 19:29:05
hanjunfeng
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9Â¥2008-11-24 09:43:29
gaochao85
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lei0736(½ð±Ò+2,VIP+0):лл »¶Ó¹âÁÙ
lei0736(½ð±Ò+2,VIP+0):лл »¶Ó¹âÁÙ
|
I think you should build the reactnat complex firstly. second, "opt" the complex. and then use QST2 |
10Â¥2008-11-24 11:33:29














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