Hydrocarbons

Among the following, total number of meta directing functional groups is (Integer based) -OCH3, -NO2, -CN, -CH3, -NHCOCH3, -COR, -OH, -COOH, -Cl

Answer

4

Solution

m-directing: -NO2, -CN, -COR, -COOH (4)

∵ −R groups (multiple bond to an electronegative atom) withdraw electrons from o/p positions ⇒ meta is attacked

o/p-directing: -OCH3, -OH, -NHCOCH3, -Cl (lone pair, +R) and -CH3 (+I, hyperconjugation)

(–Cl deactivates the ring but is still o/p-directing)

Answer: 4