Question

What is wrong with the following mechanism?

1) There is no leaving group, so there should be no arrows.
2) The arrow should be removing a proton from the H₂O group.
3) An arrow is also needed to indicate the loss of the leaving group.
4) The arrow indicating the formation of the C-Br bond (nucleophilic attack) should start at the bromide anion.

Answer 1

The provided mechanism for a nucleophilic substitution reaction is incorrect due to several issues.

Step-by-step explanation:

The mechanism described in the question is for a nucleophilic substitution reaction. There are several issues with the mechanism:

1. 
   
2. There is no leaving group indicated, which is necessary for a nucleophilic substitution reaction to occur.
3. 
   
4. The arrow should be removing a proton from the H₂O group, not just pointing to it.
5. 
   
6. An arrow is needed to indicate the loss of the leaving group.
7. 
   
8. The arrow indicating the formation of the C-Br bond (nucleophilic attack) should start at the bromide anion.
9. 
   

Overall, the provided mechanism does not accurately depict the steps and interactions involved in a nucleophilic substitution reaction.