CIE A Level Chemistry复习笔记7.6.6 Azo Compounds
Azo Compounds
- Azo (or diazonium) compounds are organic compounds that have an R1-N=N-R2 group
- They are often used as dyes and are formed in a coupling reaction between the diazonium ion and an alkaline solution of phenol
Azo compounds are characterized by the presence of an R1-N=N-R2 group
Coupling of benzenediazonium chloride with phenol in NaOH
- Azo compounds can be formed from the coupling reaction of a benzenediazonium chloride salt with alkaline phenol
- Making an azo dye is a multi-step process
Formation of azo compounds table
Reaction mechanism of the formation of azo compounds
- The delocalised electrons in the π bonding systems of the two benzene rings are extended through the -N=N- which acts as a bridge between the two rings
- As a result of the delocalisation of electrons throughout the compound, azo compounds are very stable
Making other azo dyes
- Other dyes can be formed via a similar route as described above
- For example, the yellow dye can be formed from the coupling reaction between benzenediazonium chloride and C6H5N(CH3)2instead of phenol (C6H5OH)
The yellow azo dye is formed via a coupling reaction between benzenediazonium chloride and C6H5N(CH3)2
转载自savemyexams
以上就是关于【CIE A Level Chemistry复习笔记7.6.6 Azo Compounds】的解答，如需了解学校/赛事/课程动态，可至翰林教育官网获取更多信息。
往期文章阅读推荐：
重磅！CAIE明年提前出分，爱德思理科也迎大改！这届考生如何破局？
EDX考前急救！只讲高频考点！2027年1月A-Level大考，如何用12小时极限冲刺A*？
翰林AMC8视频课重磅上线！
