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从头计算法研究反应中间体的静电势(英文).docx

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从头计算法研究反应中间体的静电势(英文).docx

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文档介绍:该【从头计算法研究反应中间体的静电势(英文) 】是由【wz_198613】上传分享,文档一共【2】页,该文档可以免费在线阅读,需要了解更多关于【从头计算法研究反应中间体的静电势(英文) 】的内容,可以使用淘豆网的站内搜索功能,选择自己适合的文档,以下文字是截取该文章内的部分文字,如需要获得完整电子版,请下载此文档到您的设备,方便您编辑和打印。从头计算法研究反应中间体的静电势(英文)
Introduction:
Chemical reactions are fundamental to many natural and synthetic processes. They involve the formation and breaking of chemical bonds, and the transfer of electrons between atoms and molecules. To understand the mechanism of chemical reactions, it is essential to study the intermediate species formed during the reaction. One way to do so is to calculate the electrostatic potential of the intermediate species.
Calculation Method:
The electrostatic potential of a molecule is a measure of the distribution of electronic charge within the molecule. It is determined by solving the Schrodinger equation for the system, and calculating the electrostatic potential using the density-functional theory (DFT) or Hartree-Fock (HF) method. DFT is a widely used method for calculating the electronic structure of molecules, and it is based on the density of electrons rather than the wave function of electrons. HF is another theoretical method that solves the Schrodinger equation by treating the electrons as a series of independent particles.
To calculate the electrostatic potential of an intermediate species, we first need to optimize the geometry of the species, using a suitable quantum-chemical method. This involves finding the equilibrium structure of the species, where the total energy of the system is at a minimum. Once the geometry has been optimized, we can then calculate the electrostatic potential of the species using DFT or HF.
Applications:
The calculation of electrostatic potentials has many applications in chemistry. For instance, it can be used to predict the reactivity of a molecule, by analyzing the distribution of electron density within the molecule. It can also be used to determine the site of reaction within a molecule, and to predict the products of a reaction.
One area where the calculation of electrostatic potentials has been particularly useful is in the study of enzyme catalysis. Enzymes are biological catalysts that speed up chemical reactions within living organisms. They achieve this by lowering the activation energy of the reaction, and by providing a specific environment for the reaction to take place. The study of enzyme catalysis involves the investigation of the electrostatic potential of the enzyme and the substrates, and the interaction between them.
Conclusion:
In summary, the calculation of electrostatic potentials is an important tool in the study of chemical reactions. It allows us to investigate the electronic structure of intermediate species, and to predict their behavior in chemical reactions. The development of new quantum-chemical methods and computer algorithms has made it possible to perform accurate and efficient calculations of electrostatic potentials, and has opened up new avenues for research in chemistry and biochemistry.

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