New Procedure to Evaluate Aromaticity at the Density Functional Theory, Hartree-Fock, and Post-Self-Consistent Field Levels
文献类型：期刊论文
| 作者 | Bao, Peng; Yu, Zhong-Heng |
| 刊名 | JOURNAL OF COMPUTATIONAL CHEMISTRY
 |
| 出版日期 | 2011-01-30 |
| 卷号 | 32期号:2页码:248-259 |
| 关键词 | Aromaticity Restricted Geometry Optimization Two-electron Integral Extra Stabilization Energy C-c Single Bond Length |
| ISSN号 | 0192-8651 |
| DOI | 10.1002/jcc.21614 |
| 英文摘要 | The spatial exchange interaction, arising from the exchange-type two-electron integrals (i(p)j(q)vertical bar i'(p)j'(q)) between two different groups P and Q, is another driving force for the delocalization of pi-electrons besides orbital charge-transfer and exchange interactions. We have developed a new combination program for restricted geometry optimization, in which all of the orbital and spatial interactions among isolated groups were excluded from the localized geometry of a conjugated molecule. This was achieved by deleting particular Fock elements and the 15 types of exchange-type two-electron integrals, ensuring that the corresponding pi-electrons are completely localized within their respective groups and the pi-orbitals are fully localized. The extra stabilization energy (ESE) of benzene is -36.3 kcal/mol (B3LYP/6-31G*), and the level of density functional theory, Hartree-Fock, and post-self-consistent field (Moller-Plesset 2, configuration interaction singles and doubles, and singles and doubles coupled-cluster) and the basis sets have slight effect on the ESE. Based on the comparisons between our procedure, Morokuma's energy decomposition analysis and the block-localized wave function method, it was confirmed that our program calculates reliable results. The nonaromaticity of acyclic polyenes and antiaromaticity of cyclobutadiene and planar cyclooctatetraene were also estimated. Comparison of the C-C single bond lengths in the ground state with its pi-localized geometries showed that shortening of the single bonds in acyclic polyenes and butadiyne should be attributed to different hybridization, demonstrating that the effect of pi-delocalization on single bonds is so small as to be negligible. (C) 2010 Wiley Periodicals, Inc. J Comput Chem 32: 248-259, 2011 |
| 语种 | 英语 |
| WOS记录号 | WOS:000285312300007 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/73869]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yu, Zhong-Heng |
| 作者单位 | Chinese Acad Sci, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, BNLMS, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bao, Peng,Yu, Zhong-Heng. New Procedure to Evaluate Aromaticity at the Density Functional Theory, Hartree-Fock, and Post-Self-Consistent Field Levels[J]. JOURNAL OF COMPUTATIONAL CHEMISTRY,2011,32(2):248-259. |
| APA | Bao, Peng,&Yu, Zhong-Heng.(2011).New Procedure to Evaluate Aromaticity at the Density Functional Theory, Hartree-Fock, and Post-Self-Consistent Field Levels.JOURNAL OF COMPUTATIONAL CHEMISTRY,32(2),248-259. |
| MLA | Bao, Peng,et al."New Procedure to Evaluate Aromaticity at the Density Functional Theory, Hartree-Fock, and Post-Self-Consistent Field Levels".JOURNAL OF COMPUTATIONAL CHEMISTRY 32.2(2011):248-259. |
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来源：化学研究所
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