烃分子里的氢原子被卤素原子取代后生成的化合物称为卤代烃,其中烃分子里的1个氢原子被1个卤素原子取代后生成的化合物称为一卤代烃。一卤代烃的种类与烃分子中氢原子的种类相等,换句话说,一卤代烃的种类与烃分子中碳原子的种类相等。现就一道例题,分析如何用“对称法”求一卤代烃的种类。 A compound in which a hydrogen atom in a hydrocarbon molecule is substituted with a halogen atom is called a halogenated hydrocarbon, and a compound in which one hydrogen atom in a hydrocarbon molecule is substituted with one halogen atom is referred to as a halogenated hydrocarbon. The type of the monohalogenated hydrocarbon is equal to the type of the hydrogen atom in the hydrocarbon molecule. In other words, the type of the monohalogenated hydrocarbon is equal to the type of the carbon atom in the hydrocarbon molecule. Now on an example, analysis of how to use “Symmetry ” for a halogenated hydrocarbon species.