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YYTDD1124

银虫 (小有名气)

[交流] 【求助】请教大家:计算铜配合物用什么基组?

各位虫友好:
    我现在计算一个含铜元素的配位化合物,分子中还有C,N,O,Cl,H元素。用什么基组比较好呢?
    我用LANL2DZ算了一下,不是很好。
    请大家赐教!谢谢!1
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bylin

金虫 (小有名气)

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小木虫(金币+0.5):给个红包,谢谢回帖交流
lei0736(金币+5,VIP+0):谢谢 6-12 21:43
Thomas R. Cundari的《Computational organometallic chemistry》里对赝势与过渡金属有如下的描述,可供参考:

An important theoretical aspect for calculating TM compounds concerns
the effect of relativity. It is well known that relativistic effects must be considered in the calculation in order to obtain reliable geometries and energies of 2nd- and 3rd-TM-row molecules (43). Elements of the first TM row are little influenced by relativity, except for copper (43,44). The most convenient way to include relativistic effects in the calculations is the use of quasi-relativistic ECPs or AIMPs. The techniques of relativistic ECPs for molecules containing transition metals and other heavy atoms have recently been reviewed (45).

下面是相关参考文献:
43. (a) P Pyykko¨. Chem Rev 88:563–594, 1988. (b) J Almlo¨f, O Gropen. Rev Comput Chem 8:203–244, 1996. (c) P Schwerdtfeger, M Seth. In: PvR Schleyer, NL Allinger, T Clark, PA Kollman, HF Schaefer III, PR Scheiner (eds.). Encyclopedia of Computational Chemistry. Vol. 4. Chichester, UK: Wiley-VCH, 1998, pp 2480–2499.
44. (a) LA Barnes, M Rosi, CW Bauschlicher. J Chem Phys 93:609–624, 1990. (b) I Antes, G Frenking. Organometallics 14:4263–4268, 1995.
45. K Balasubramanian. In: PvR Schleyer, NL Allinger, T Clark, PA Kollman, HF Schaefer III, PR Scheiner (eds.). Encyclopedia of Computational Chemistry. Vol. 4. Chichester, UK: Wiley-VCH, 1998, pp 2471–2480.
9楼2009-06-12 19:28:51
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shalene

至尊木虫 (著名写手)

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小木虫(金币+0.5):给个红包,谢谢回帖交流
gwdavid(金币+1,VIP+0):3q 6-10 23:04
去EMSL Basis Set Exchange找
2楼2009-06-10 22:01:34
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caipingl

木虫 (正式写手)

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yuhuobuku(金币+2,VIP+0):欢迎参加讨论 6-12 09:22
有的时候对于第一过渡系列的金属原子采用全电子基组计算可能会得到更好的结果,但是需要加极化和扩散函数。
4楼2009-06-12 06:32:34
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Jasminer

铁杆木虫 (著名写手)

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lei0736(金币+2,VIP+0):谢谢 6-12 10:25
金属用LanL2DZ,其它原子用常规基组,如6-31G(d)
5楼2009-06-12 09:46:26
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