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在立体化学教学过程中,常常需要确定绝对构型,国际上采用R、S表示。Cahn-Ingold-Prelog等人提出了原子或原子团优先规则,在国内外大部分有机化学教科书中都有详细介绍,这种确定R、S构型的方法需要画出立体结构,学生在初学时运用起来很不顺手,特别是对两个手性碳以上的构型很难作出正确的判断。为了简化一般教科书中判定方法,有人提出直接采用Fischer投影式,从平面判断R、S构型,Dietzel
In stereochemical teaching process, often need to determine the absolute configuration, the international use of R, S said. Cahn-Ingold-Prelog et al. Proposed the atomic or atomic cluster priority rules, which are described in detail in most organic chemistry textbooks at home and abroad. This method of determining the R, S configuration needs to draw a three-dimensional structure, It is not easy to get up, especially for the two configurations above the chiral carbon is difficult to make the right judgments. In order to simplify the general textbook decision method, it was suggested that direct use of Fischer projection, judging from the plane R, S configuration, Dietzel