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一种利用外层原子价态书写路易斯结构式的简便方法

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本文提出了一种简便的绘制路易斯结构式方法.该方法首先构建一个符合外层原子价态的初步结构,并将分子的电荷(如存在)放置于中心原子.接下来,若中心原子的电子数未满八个,将通过转换成键电子和外层原子上的孤对电子来达到八隅体结构,此过程将自动产生形式电荷,无需额外计算.此方法不同于传统需先计算价电子总数的做法,更侧重于利用化合价来构建路易斯结构式,从而减少计算错误的可能性.
A Streamlined Method for Drawing Lewis Structures Using the Valence State of Outer Atoms
This article presents a streamlined approach to drawing Lewis structures that begins by constructing a trial structure that adheres to the valence states of the outer atoms,with any molecular charge (if present) placed on the central atom.The subsequent step adjusts bond and lone pairs to fulfill an octet configuration for the central atom if its electron count deviates from 8.This method facilitates the automatic generation of formal charges,eliminating the need for additional calculations typically required in other approaches that start with determining the total number of valence electrons.By focusing on valence configurations to construct Lewis structures,this method reduces the potential for errors associated with miscalculations.

Lewis structuresFormal chargeCovalent bondOctet rule

汪海平

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江汉大学光电材料与技术学院,武汉 430056

路易斯结构式 形式电荷 共价键 八隅体规则

2024

大学化学
北京大学 中国化学会

大学化学

影响因子:0.636
ISSN:1000-8438
年,卷(期):2024.39(8)