31. The initial nucleophilic attack on the azide is the rate-limiting step. 32. Lithium diisopropylamide is a popular non-nucleophilic base used in organic synthesis. 33. A Fischer carbene can undergo nucleophilic abstraction where a methyl group is removed. 34. Since then TMSCF 3 has been widely used as a nucleophilic trifluoromethylating agent. 35. The f _ + function represents the initial part of a nucleophilic reaction. 36. In organic chemistry, ether cleavage is an acid catalyzed nucleophilic substitution reaction. 37. First, they classified each reducing agent as nucleophilic . 38. The nucleophilic attacks by water or alcohol, especially in the presence of light. 39. Therefore, electrophilic aromatic substitution is more difficult while nucleophilic aromatic substitution is facilitated. 40. There are many variations of nucleophilic addition reactions.