3. Acids and Bases
Reaction Mechanism
31PRACTICE PROBLEM
Determine the type of each of the arrows marked in the following arrow-pushing mechanism.
![](https://lightcat-files.s3.amazonaws.com/problem_images/9cb2bd9b1555b163-1685452485770.jpg)
Type I: nucleophilic attack by a lone pair of electrons
Type II: heterolytic cleavage of a σ bond
Type III: nucleophilic attack by the π electrons
Type IV: dissociation of a π bond
Type V: formation of a π bond
Determine the type of each of the arrows marked in the following arrow-pushing mechanism.
Type I: nucleophilic attack by a lone pair of electrons
Type II: heterolytic cleavage of a σ bond
Type III: nucleophilic attack by the π electrons
Type IV: dissociation of a π bond
Type V: formation of a π bond