Complete the following reactions:
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-01.png)
SOLUTION:
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-02.png)
The iodide ion acts as a nucleophile, replacing the chloride.
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-03.png)
The acetate ion replaces bromine by the SN2 mechanism.
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-04.png)
The cyanide ion acts as a nucleophile, replacing the bromine.
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-05.png)
Tosyl is replaced by the SN2 mechanism by iodide.
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-06.png)
The sulfur compound attacks the carbon of the methyl iodide, replacing the iodine.
![nucleophilic-substitution sustitucion-nucleofila](/images/stories/organica-i/reacciones-sustitucion/problemas-sn2/problema-01/sustitucion-nucleofila-07.png)
This last reaction occurs in two stages. In the first, a good leaving group is obtained by using tosyl chloride. In the second stage, the replacement of the tosylate by iodide occurs.