立体化学教学中不同教学语言的运用

doi:10.3866/PKU.DXHX201807005

Abstract

Abstract:

The stereochemistry is an important and difficult part in the teaching of organic chemistry. The application of different teaching languages in stereochemistry teaching is discussed from three aspects. How to reveal the characteristics of a concept in a concise manner, especially the short description of the key elements of enantiomerism in as short as 32 words; how to use creative metaphor and figurative expressions to help vivid understanding; how to promote the intuition and improve the efficiency of study using multimedia technology.

Key words: Stereochemistry, Teaching language, Key element, Metaphor, Multimedia

Yiping CHEN,Chunman JIA,Wen ZHU,Xinguang WANG. Application of Different Teaching Languages in Stereochemistry Teaching[J].University Chemistry, 2019, 34(4): 20-25.

Figures/Tables 6

References 9

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对称因素			手性因素
种类	判别		种类	判别
对称中心i	无手性，∴无旋光性	$对称因素\underset{允许有对称轴}{\overset{缺乏对称因素}{\mathop{\rightleftharpoons }}}\,手性因素$	手性中心(C，N，P等)	是有手性的必要条件；但含手性中心不一定有手性
对称轴C_n	不能作判别有无旋光性		手性轴	旋转受阻，有手性，∴有旋光性
交替对称轴S_n	若有S₄，则无旋光性
对称面σ	无手性，∴无旋光性		手性面	有手性，∴有旋光性

分类	关键要素	简单释义	应用范围
构型使用	横前竖后	横键伸向前，竖键朝后边	Fischer投影式的书写和使用
	最小最远	次序最小的基团放在离观察者最远的位置	R/S构型的标记
	原序序大	原子序数按从大到小排序	次序规则^*
	关联甘醛	以甘油醛为参照或关联来确定构型	D/L构型的标记
相互关系	手性致旋	手性分子具有旋光性	手性和旋光性的相互关系

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Application of Different Teaching Languages in Stereochemistry Teaching

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