Question

3. (10 points) Let us take a closer look at the electrophilic aromatic substitution step. 1) Draw the mechanism of the electrophilic aromatic substitution step. HO. electrophilic Hor o so substitution но сня CH3 2) What is the role of the second hydroxyl group on benzene? 3) If 1,3,5-trihydroxybenzene is the starting material, will the reaction be faster or slower? Why?

Answer 1

Answer] 1) Ho OD CO Electiephil Substitution : CH2 но си, Mechanism H02 YH- HO ное сч, олон, The second hydroxy group hou tr elkect and it will siate the electes to the benzene ning and election density os benzene sing increases. The second hydoneyl group achvate the ben zene ring lor electrophilic sub shitahan Teachoom and teacheon occurs faster 15 1,3,5- kihydroney benzene is the starting material, then teach will be occurs faster. As number -OH groups on benzene ting increases, the election density of benzene ring increases and also stability of 6-Complex intermediate increase. There sore due to higher achevahoon ols benzene ring and stability o's 6- complexe intermediate 1,35- biny docsy benzene undergoes faster reach 007. Isop - Hözpilot In you hoyono Y Afy, be more stable 6-Complex o