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有机化学试题作为历年各类考试的重、难点问题,随着课改理综试题结构、难度与分值的变化,在考查形式上逐渐开始呈现新的变化。以往对有机化学的考查,主要涉及同分异构体的书写、满足条件的某物质的同分异构体的结构书写等,近年来增加了关于符合某些相关条件的某物质同分异构体的数目判断。这不仅仅要求会写同分异构体,更需要将符合条件的一一罗列,从难度角度而言就更进一步。本文以几例分析残基法在此类问题中的应用。
As the heavy and difficult questions of all kinds of exams in the past years, organic chemistry questions gradually begin to show new changes in the form of examinations with the changes in the structure, difficulty and scores of course examinations. In the past, the examination of organic chemistry mainly involved the writing of isomers and the structural writing of the isomers of a substance which met the requirements. In recent years, some substance isomers that meet certain relevant conditions have been added The number of bodies to judge. This requires not only to write isomers, but also to meet the requirements of a list, from a more difficult point of view. This article analyzes the application of the residue method to such problems with a few examples.