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waterlily1715

银虫 (初入文坛)

[交流] 【求助】请教一个关于对称性破损的问题 已有3人参与

看了一篇文献上说,为了计算破损态能量,用开壳层不受限制的UB3LYP先计算分子的三重态能量,再在三重态的基础上运用轨道和电子密度混合方法把三重态与单重态混合来计算BS态的能量。请教各位前辈,“三重态的基础上运用轨道和电子密度混合方法把三重态与单重态混合来计算BS态的能量”是什么意思啊,具体的高斯输入文件怎样弄呢?十分感谢!
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ZJboy

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引用回帖:
Originally posted by waterlily1715 at 2010-05-07 18:51:16:

Thank you very much! But my structure don't need optimizing,its structure have already be obtained by experiment.And I try my input file and found that the in the output is 1.0017.Do ...

请我那你计算之后,结果可以令你满意吗?有没有又发现什么问题?
10楼2010-05-07 23:13:07
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recoli

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waterlily1715(金币+5): 2010-05-04 10:12
gavinliu7390(金币+1):感谢交流! 2010-05-09 08:46:29
guess=mix
2楼2010-04-29 20:20:07
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waterlily1715

银虫 (初入文坛)

引用回帖:
Originally posted by recoli at 2010-04-29 20:20:07:
guess=mix

十分感谢你,我知道了需要用guess=mix关键字,可是我想知道在计算对称性破损的时候,怎样在三重态的基础上mix,在输入文件里是输入1还是3啊,我自己看文献学的,所以有许多不懂得地方,请多多指教啊!
3楼2010-05-04 10:25:27
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recoli

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aylayl08(金币+1):谢谢解答 2010-05-07 18:15:29
spin multiplicity=1 for BS state
4楼2010-05-04 15:10:11
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waterlily1715

银虫 (初入文坛)

引用回帖:
Originally posted by recoli at 2010-05-04 15:10:11:
spin multiplicity=1 for BS state

你好,这是我计算破损态的输入文件,请问这样对吗,是不是有什么遗漏的命令呢,是怎样体现出在三重态的基础上混合的呢?真的十分感谢你啊!

破损态的计算(省略了坐标和一些空格)
# uB3LYP/genecp geom=connectivity scf=(conver=7)  guess=mix
0 1
…………
…………
C H N O 0
sv
****
Cu 0
tzvp
****
5楼2010-05-07 16:08:06
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recoli

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★ ★
aylayl08(金币+2):谢谢再次回复 2010-05-07 18:15:45
waterlily1715(金币+5): 2010-05-07 18:39:08
I didn't find any mistake. Just try it. Check the in the output.

"在三重态的基础上", I think it means that you optimize your structure by triplet calculation, and then calculate the broken-symmetry state at this optimized structure.
6楼2010-05-07 17:28:02
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waterlily1715

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引用回帖:
Originally posted by recoli at 2010-05-07 17:28:02:
I didn't find any mistake. Just try it. Check the in the output.

"在三重态的基础上", I think it means that you optimize your structure by triplet calculation, and then cal ...

Thank you very much!
7楼2010-05-07 18:40:31
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waterlily1715

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引用回帖:
Originally posted by recoli at 2010-05-07 17:28:02:
I didn't find any mistake. Just try it. Check the in the output.

"在三重态的基础上", I think it means that you optimize your structure by triplet calculation, and then cal ...

Thank you very much! But my structure don't need optimizing,its structure have already be obtained by experiment.And I try my input file and found that the in the output is 1.0017.Does it mean that it is broken-symmetry state?
8楼2010-05-07 18:51:16
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recoli

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引用回帖:
Originally posted by waterlily1715 at 2010-05-07 18:51:16:

Thank you very much! But my structure don't need optimizing,its structure have already be obtained by experiment.And I try my input file and found that the in the output is 1.0017.Do ...

I think so.
9楼2010-05-07 20:03:52
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