<正>“准手征性”及“假手征性碳”这两个概念在有机化学教学中很少涉及到,但在一些较为深广的有机化学书中和高等有机化学中提到了。弄清这两个概念对进一步掌握有机化合物的立体结构,特别是旋光异构的构型方面(对环状化合物还联系到顺反异构)是很有好处的。本着教学研究以及党的“双百”方针的精神,作者对这两个问题提出如下看法。

Both "Chiral" and "Pseudoasymmetric Carbon" are fundamental concepts ia stereochemistry. They are dealt with and are vividly illustrated with concrete compounds in the teaching of organic chemistry, which is very important.The concept of "Prochiral" involves a very wide field and the concepts of "Enan-tiotopic" and "Diastereotopic" are derived from it. But these concepts are neither a summing up of new rules nor a further generalization of the established ones. The author holds that these concepts can only lead to confusions when the structure and mechanisms of organic compounds are discussed. So it would be preferable to abandon them, at least in the field of organic chemistry.The configurational analysis of "Pseudoasymmetric Carbon" can also be applied to the cyclic compounds and it is very interesting when it is connected with cis-trans isomerism.