Excited States of the Nickel Carbonyls Ni(CO) and Ni(CO)4: Challenging Molecules for Electronic Structure Theory.
Excited States of the Nickel Carbonyls Ni(CO) and Ni(CO)4: Challenging Molecules for Electronic Structure Theory.
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羰基镍 Ni(CO) 和 Ni(CO)4 的激发态:电子结构理论的挑战分子。
DOI:
10.1021/acs.jpca.5b04844
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
McKinlay RG
中科院分区:
文献类型:
--
作者:
McKinlay RG
We apply a wide range of correlated electronic structure approaches to the excited states of Ni(CO)4and Ni(CO) as model complexes of saturated and unsaturated transition metal carbonyls respectively to understand the performance of each method, in addition to setting benchmark data for these metal carbonyls. In particular, we apply the coupled-cluster linear response hierarchy, complete-active-space self-consistent field theory, N-electron valence state multireference perturbation theory, Monte Carlo configuration interaction, and time-dependent density functional theory with a range of functionals and basis sets. We find that although the systems can qualitatively be described by a single configuration, electron correlation effects are sufficiently strong to give large single amplitudes in cluster expansions, which cause spurious solutions to the response equations for the intermediate CCn methods. DFT also performs well if care is taken to choose an appropriate functional, although for Ni(CO) several popular functionals give the incorrect ground spin-state, depending on the amount of Hartree–Fock exchange.
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DOI:
10.1021/jp9614355
发表时间:
1996
期刊:
The Journal of Physical Chemistry
影响因子:
--
作者:
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DOI:
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发表时间:
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期刊:
影响因子:
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作者:
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通讯作者:
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