# Exercises

Exercise

From which side does the nucleophile in an $SN2$ reaction approach the substrate?

correct

wrong

partly correct

 From the front side. No, sorry. From the back side. Correct! From the bottom. Sorry, that is not correct. From the top side. Sorry, that is wrong. From all sides. No, sorry.
Exercise

In the $SN2$ reaction's transition state, the central carbon is $sp2$-hybridized, while the remaining three substituents are accordingly arranged trigonal planar around the central carbon. Where is the negative charge located?

correct

wrong

partly correct

 Completely on the nucleophile. Sorry, that is wrong. Completely on the leaving group. No, sorry. It is distributed between the nucleophile and the leaving group. That is correct! It is distributed between the central carbon and the leaving group. Sorry, that is not correct. It is distributed between the nucleophile and the central carbon. No, sorry.
Exercise

The rejection of the three remaining substituents during an $SN2$ reaction leads to ...