31. The reaction is an electrophilic aromatic substitution, using arsenic acid as the electrophile. 32. The reaction is a type of electrophilic aromatic substitution accompanied by elimination of water. 33. However, many resonance-stabilized carbocations are insufficiently electrophilic to react with hydrosilanes. 34. This is because the thiol groups are nucleophilic while the arsenic atoms are electrophilic . 35. There are two main types of polar addition reactions : electrophilic addition and nucleophilic addition. 36. These dipoles add to electrophilic alkenes readily. 37. They are electrophilic both at the carbonyl carbon but also at the ?-carbon. 38. In the Friedel Crafts acylation, acid halides act as electrophiles for electrophilic aromatic substitution. 39. The Wheland intermediate is its opposite number and the reactive intermediate in electrophilic aromatic substitution. 40. It is more electrophilic than quinone itself.
