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一、概述铵盐(NH_4X)中的氢原子,可以逐个地被烃基所取代,若四个氢原子全部被烃基取代,就得到季铵盐化合物。取代氢原子的四个烃基,可以是相同的基团,也可以是不同的基团。吡啶和喹啉是特殊形式的叔胺化合物,它们进一步加成而得到的烷基吡啶盐
First, an overview of ammonium (NH_4X) hydrogen atoms, one by one can be replaced by a hydrocarbon group, if all four hydrogen atoms were replaced by alkyl, you get quaternary ammonium compounds. The four hydrocarbon groups substituted for the hydrogen atoms may be the same group or different groups. Pyridine and quinoline are special forms of tertiary amine compounds which are further added to give alkylpyridinium salts