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化合物的构型除用Fischer投影式外,还可以依据基团在空间的排列的相对位置,而采用想象的三维空间而以透视法表示。但以往在透视式中,由于符号使用混乱影响了表达效果,为此国际纯粹和应用化学联合会(IUPAC)于1974年公布的《有机化学命名法》E部[注]中,作了具体的建议,规定用黑粗线(——)表示从纸面伸向读者方向的键。虚线
In addition to the Fischer projection method, the configuration of the compound can also be expressed in perspective using the imaginary three-dimensional space, depending on the relative arrangement of the groups in space. However, in the past, in the perspective type, due to the confusion in the use of symbols, the effect of expression was affected. For this reason, in the “Organic Nomenclature of Organic Chemistry” section 1974 published by the International Union of Pure and Applied Chemistry (IUPAC), a specific It is recommended that the black thick line (-) be used to indicate the key that extends from the paper to the reader. dotted line