Benzene Ring With Ketone Group. Remember that you get a methyl group ch 3 by removing a hydrogen from methane ch 4. In an electrophilic aromatic substitution reaction existing substituent groups on the aromatic ring influence the overall reaction rate or have a directing effect on positional isomer of the products that are formed. This is so that you are sure that the chlorine is part of the methyl group and not somewhere else on the ring.
Aromatic compounds with only one group attached to the benzene ring. This is so that you are sure that the chlorine is part of the methyl group and not somewhere else on the ring.
In an electrophilic aromatic substitution reaction existing substituent groups on the aromatic ring influence the overall reaction rate or have a directing effect on positional isomer of the products that are formed.
Notice the brackets around the chloromethyl in the name. Aromatic compounds with only one group attached to the benzene ring. The carbonyl group is on carbon 3 and the methyl group is on carbon 5. The carbon atom of this group has two remaining bonds that may be occupied by hydrogen alkyl or aryl substituents.
