【摘要】 从定性和定量两方面对五元杂环化合物和吡啶芳香性强弱进行了分析论证并排序 ,对五元杂环和六元杂环吡啶的亲电取代反应的部位及难易原因进行了分析论证并排序 .更多还原

【Abstract】 The aromatic strength of 5-element hereocyclic compounds an d pyridines were analysed qualitatively and quantitatively,and the sequence of a romative strength was given.The sites of 5-element heterocyclic compounds and 6 -element heterocyclic pyridine at which close electron substitutive reaction ta kes place were found and proved .The reason why close electron substitutive reactio n takes place more easily in one compound than in another was analysed.更多还原