Who Needs Lewis Structures to Get VSEPR Geometries
Who Needs Lewis Structures to Get VSEPR Geometries
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谁需要路易斯结构来获得 VSEPR 几何形状
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. F. Lindmark
中科院分区：
文献类型：
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作者：
A. F. Lindmark
教VSEPR（价层电子对排斥）模型可能是一个繁琐的过程。传统上，绘制刘易斯结构，计算中心原子周围的“电子云”（群）的数量，并与可能的几何形状的标准VSEPR表相关联。本文介绍了一种不用先画出刘易斯结构而推导VSEPR结构的简单方法。利用这种方法来确定VSEPR几何形状的一个样本讲座。纳入讲座是讨论相关议题，包括偶极矩，异构体，电子对排斥，和生物无机化学。虽然本讲座是针对一年级理科专业，它可以很容易地修改和应用到非理科专业课程和先进的无机化学课程。辅助材料中提供了一个伴随讲座的实验室。
Teaching the VSEPR (valence shell electron-pair repulsion) model can be a tedious process. Traditionally, Lewis structures are drawn and the number of “electron clouds” (groups) around the central atom are counted and related to the standard VSEPR table of possible geometries. A simpler method to deduce the VSEPR structure without first drawing Lewis structures is described. A sample lecture utilizing this methodology to determine VSEPR geometries is presented. Incorporated into the lecture are discussions of relevant topics including dipole moments, isomers, electron-pair repulsions, and bioinorganic chemistry. Although this lecture is aimed at first-year science majors, it can easily be modified and applied to nonscience-majors courses and advanced inorganic chemistry courses. A lab to accompany the lecture is available in the supporting material.