大学化学 >> 2025, Vol. 40 >> Issue (3): 186-192.doi: 10.12461/PKU.DXHX202406085

所属专题: 理论与计算化学在化学及其交叉学科教学中的应用

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C6H6与B12H122-的分子轨道和核独立化学位移计算——推荐一个普适性的计算化学实验

刘吉英, 李泽华, 张文静, 魏东辉   

  1. 郑州大学化学学院, 郑州 450001
  • 收稿日期:2024-06-24 录用日期:2024-11-24 发布日期:2025-03-19
  • 通讯作者: 张文静, 魏东辉 E-mail:donghuiwei@zzu.edu.cn;zhangwj@zzu.edu.cn
  • 基金资助:
    国家自然科学基金青年基金项目(21503191);河南省自然科学基金优秀青年科学基金项目(212300410083);河南省科技攻关项目(222102210297)

Molecular Orbital and Nucleus-Independent Chemical Shift Calculations for C6H6 and B12H122-: A Computational Chemistry Experiment

Jiying Liu, Zehua Li, Wenjing Zhang, Donghui Wei   

  1. College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
  • Received:2024-06-24 Accepted:2024-11-24 Published:2025-03-19
  • Contact: Wenjing Zhang, Donghui Wei E-mail:donghuiwei@zzu.edu.cn;zhangwj@zzu.edu.cn

摘要: 苯(C6H6)与二十面体硼烷(B12H122-)是具有π-和σ-芳香性分子的典型代表。本实验采用密度泛函理论(DFT)分别计算二者的分子轨道图及核独立化学位移值,引导学生了解计算化学研究芳香性的一般方法,构建对电子离域结构的直观认知。通过对比分析,帮助学生加深对芳香性的理解,达到巩固基础,拓宽视野,提升创新技能的目的。实验普适性好,易于推广。

关键词: C6H6, B12H122-, 分子轨道, 核独立化学位移(NICS), σ-芳香性, π-芳香性

Abstract: Benzene (C6H6) and icosahedral borane (B12H122-) are classical examples of molecules exhibiting π-aromaticity and σ-aromaticity, respectively. This experiment utilizes density functional theory (DFT) calculations to plot the molecular orbitals and nucleus-independent chemical shift (NICS) of both C6H6 and B12H122-. The goal is to provide students with a deeper understanding of aromaticity, particularly σ-aromaticity. By comparing the two systems, the experimental helps students grasp general methods for studying aromaticity through computational chemistry, thereby expanding their knowledge and fostering innovation skills. The experiment is highly universal, practical, and easily adaptable for broader use.

Key words: C6H6, B12H122-, Molecular orbital, Nucleus-independent chemical shift (NICS), σ-aromaticity, π-aromaticity