软硬酸碱理论经验规则的原因探讨

doi:10.3866/PKU.DXHX202208150

University Chemistry ›› 2022, Vol. 37 ›› Issue (11): 2208150.doi: 10.3866/PKU.DXHX202208150

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The Nature of the Empirical Rule on Hard and Soft Acid and Base Interactions

Pingping Zhao¹^,*(), Kai Hu², Ping Cai², Gongzhen Cheng²

¹ Research Center for Graphic Communication, Printing and Packaging, Wuhan University, Wuhan 430072, China
² College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China

Received:2022-08-31 Accepted:2022-10-12 Published:2022-11-02
Contact: Pingping Zhao E-mail:ppzhao@whu.edu.cn

Abstract

Abstract:

Hard and soft acid and base (HSAB) theory is the main component of Lewis acid and base theory. The interaction between acid and base relies strongly on empirical rules. In this work, we try to reveal the nature behind those empirical rules using molecular orbital theory, which most chemistry-major students understand. It is found that the chemical bonds between hard acids and hard bases are mainly ionic, while soft acids mainly form covalent bonds with soft bases. It is also illustrated that this method can be conveniently used to solve the structure and reaction problems in inorganic chemistry.

Key words: Lewis acid and base, HSAB, MOT, Frontier MO, Structure and properties

Pingping Zhao, Kai Hu, Ping Cai, Gongzhen Cheng. The Nature of the Empirical Rule on Hard and Soft Acid and Base Interactions[J].University Chemistry, 2022, 37(11): 2208150.

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The Nature of the Empirical Rule on Hard and Soft Acid and Base Interactions

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