Application of explicitly correlated coupled-cluster methods to molecules containing post-3d main group elements
Application of explicitly correlated coupled-cluster methods to molecules containing post-3d main group elements
复制标题
显式相关耦合簇方法在包含后 3d 主族元素的分子中的应用
DOI:
10.1080/00268976.2011.624129
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发表时间:
2011
影响因子:
1.7
通讯作者:
H.-J. Werner
中科院分区:
文献类型:
--
作者:
K. A. Peterson;C. Krause;H. Stoll;J. G. Hill;H.-J. Werner
A benchmark of explicitly correlated CCSD(T)-F12 methods for the dimers Ga2, As2, Br2and diatomic molecules AsN, BrO, HBr, GaF, GaCl, GaBr, AsF, AsCl, BrF, and BrCl is presented. Equilibrium distances, harmonic vibrational frequencies, and dissociation energies are compared with extensive conventional CCSD(T) calculations using a variety of orbital basis sets and different ansätze for the explicitly correlated wavefunctions. Correlation of the 3delectrons has a strong effect, in particular on the equilibrium distances, and it is shown that this can be recovered very efficiently by the explicit correlation treatment. It is found that CCSD(T)-F12 calculations with new F12-specific cc-pVnZ-F12 basis sets give comparable accuracy to standard CCSD(T) calculations with very much larger aug-cc-pwCV(n+2)Z basis sets. The effects of higher order valence electron correlation (up to CCSDTQP) are also investigated in conventional calculations and are found to be significant in some cases.
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DOI:
10.1063/1.1757439
发表时间:
2004
期刊:
The Journal of chemical physics
影响因子:
--
作者:
S. Ten
通讯作者:
S. Ten
影响因子:
1.7
作者:
H. Werner;G. Knizia;F. Manby
通讯作者:
H. Werner;G. Knizia;F. Manby
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
F. Bischoff;S. Höfener;Andreas Glöss;W. Klopper
通讯作者:
W. Klopper
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
I. Shim;K. Mandix;K. Gingerich
通讯作者:
K. Gingerich
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
W. Klopper;C. Samson
通讯作者:
C. Samson