ORGANIC CHEMISTRY Chapter 15 3. Aryl and vinylic halides cannot be used as the halide component because they do not form carbocations readi Cl Alc no Friedel-Crafts reaction or CH2-CHCl 4. Polyalkylations often occur CHJ CH CH AIC CH ch CH Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 15 3. Aryl and vinylic halides cannot be used as the halide component because they do not form carbocations readily. Cl CH2 CHCl + or AlCl3 no Friedel-Crafts reaction 4. Polyalkylations often occur. + CH3Cl CH3 CH3 CH3 + AlCl3 CH3 CH3 +