Question

Place the following in order from least reactive to most reactive, in reference to reactivity towards electrophilic aromatic substitution a.) Group 1 b.) Group 2 or or of

Answer 1

1. rate of electrophilic Aromatic reaction increase substitution If the group attached with benaene ring is election donating. le elecron realsing group increases the é density on benzene through tm of tI effect and hence reactivity. While election withdrawing group decreases the rate. ro is electon reasing group show ting effect and opta ant _N4 are elechon w . but them in strong deactivator as compare to L_NH,

order is ( da in H is deactivating group & decreases the rate. increase the rate is weakly -noh is weakly activating s deactivator. so order is von Eron <way