Accurate bond dissociation enthalpies by using doubly hybrid XYG3 functional
Accurate bond dissociation enthalpies by using doubly hybrid XYG3 functional
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DOI:
10.1002/jcc.21764
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发表时间:
2011-03
影响因子:
3
通讯作者:
Igor Ying Zhang;Jianming Wu;Yi Luo;Xin Xu
中科院分区:
文献类型:
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作者:
Igor Ying Zhang;Jianming Wu;Yi Luo;Xin Xu
In this work, we examine the performance of XYG3, a newly developed doubly hybrid density functional (Zhang, Xu, and Goddard III, Proc Natl Acad Sci USA 2009, 106, 4963), to calculate covalent bond dissociation enthalpy (BDE). We use 5 atoms, 32 molecular radicals, and 116 closed‐shell molecules to set up 142 bond dissociation reactions. For the total of 148 heats of formation (HOFs) and 142 BDEs, XYG3 leads to mean absolute deviations (MADs) of 1.45 and 1.87 kcal/mol, respectively. In comparison with some other functionals, MADs for HOFs are 2.31 (M06‐2X), 2.98 (B2PLYP‐D), 3.04 (BMK), 3.96 (B3LYP), 4.47 (B2PLYP), 5.42 (B2GP‐PLYP), 6.46 (PBE0), and 29.93 kcal/mol (B3P86), and the corresponding errors for BDEs are 2.06 (M06‐2X), 2.25 (BMK), 2.51 (B2PLYP‐D), 2.89 (B2GP‐PLYP), 3.30 (B3P86), 3.44 (B2PLYP), 3.87 (PBE0), and 6.14 kcal/mol (B3LYP). © 2011 Wiley Periodicals, Inc. J Comput Chem, 2011