Part IV-MECHANISMS (5 points for each,10 POINTS) 40.Provide a detailed stepwise mechanism for the reaction shown below.Please show all your work indudingelsectonfiow △ 41.Write a complete mechanism for the base-catalyzed crossed aldol reaction shown below.Show all steps and all resonance forms for any intermediates involved. ,义C 第7页第 7 页 Part IV –MECHANISMS (5 points for each, 10 POINTS) 40. Provide a detailed stepwise mechanism for the reaction shown below. Please show all your work including electron flow. Cl2, FeCl3 NO2 NO2 Cl 41. Write a complete mechanism for the base-catalyzed crossed aldol reaction shown below. Show all steps and all resonance forms for any intermediates involved