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江汉秋影燕

金虫 (小有名气)

[求助] 高斯输入文件书写 已有1人参与

向大家请教一个问题
MP2/aug-cc-pVTZ//B3LYP/6-311+G**,这种在高斯里是如何实现的,就是输入文件怎么写?
谢谢大家帮助
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江汉秋影燕

金虫 (小有名气)

The geometries of the
complexes and the respective monomers were fully
optimized at the B3LYP/6-311+G** level. The inter-
action energies in gas phase used in the discussions
were calculated by
  (1)
where Ecomplex, EMAX (or EHOY), and EFA are the
MP2/aug-cc-pVTZ//B3LYP/6-311+G** single-point
energies of the hydrogen- and halogen-bonded com-
plex, MAX (X = F, Cl, Br, NO2, H, OH, CH3, and
NH2), HOY (Y = F, Cl, and Br), and FA, respectively.
ΔEBSSE is the BSSE (Basis Set Superposition Error)
correction estimated at the same level using the stan-
dard counterpoise method [13] and the BSSE correc-
tion did not been taken into account the structure relax-
ation of molecules. ΔEZPE is the zero point energy
(ZPE) correction at the B3LYP/6-311+G** level.
The previous research [14] indicated the reliability
of the MP2/aug-cc-pVTZ level in describing the
H-bond energies, which gives us confidence to assume
that the level used at least gives reliable trend about
H-bond energies. Therefore, the MP2/aug-cc-pVTZ
int  complex  MAX  HOY
FA  BSSE  ZPE
(or  )
,
E E  E  E
E E E
Δ =  −
− +  Δ +
2楼2021-08-06 10:34:23
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paramecium86

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【答案】应助回帖

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感谢参与,应助指数 +1
zhou2009: 金币+3 2021-08-06 16:00:11
江汉秋影燕: 金币+20, ★★★★★最佳答案 2021-08-06 16:58:58
就是直接这样写就可以。默认就是// 之后的级别先做几何优化。收敛之后用//之前的方法做一次单点能计算。
比如就写成下面这个样子

%nproc=12
%mem=12GB
#p  MP2/aug-cc-pVTZ//B3LYP/6-311+G**

Title Card Required

0 1
O                  2.02108972    4.36731101    0.00000000
H                  2.98108972    4.36731101    0.00000000
H                  1.70063513    5.27224684    0.00000000
3楼2021-08-06 14:05:01
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江汉秋影燕

金虫 (小有名气)

引用回帖:
3楼: Originally posted by paramecium86 at 2021-08-06 14:05:01
就是直接这样写就可以。默认就是// 之后的级别先做几何优化。收敛之后用//之前的方法做一次单点能计算。
比如就写成下面这个样子

%nproc=12
%mem=12GB
#p  MP2/aug-cc-pVTZ//B3LYP/6-311+G**

Title Card  ...

还有个问题想请教一下,一个“ΔEZPE is the zero point energy(ZPE) correction at the B3LYP/6-311+G** level”
这个ΔEzpe是OUT文件里“Zero-point correction=                           0.112679 (Hartree/Particle)”的差值吗?
简单点来说,就是A+B=C的一个弱相互作用的计算,ΔEzpe就是C的零点能校正值减去A,B两者的和?
4楼2021-08-06 14:44:58
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paramecium86

版主 (著名写手)

引用回帖:
4楼: Originally posted by 江汉秋影燕 at 2021-08-06 01:44:58
还有个问题想请教一下,一个“ΔEZPE is the zero point energy(ZPE) correction at the B3LYP/6-311+G** level”
这个ΔEzpe是OUT文件里“Zero-point correction=                           0.112679 (Hartree/ ...

是的。
5楼2021-08-06 16:34:51
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江汉秋影燕

金虫 (小有名气)

6楼2021-08-06 16:57:55
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