SN1 AND SN2

Front

What is the S_N1 reaction mechanism?

Back

The S_N1 (Substitution Nucleophilic Unimolecular) reaction mechanism involves a two-step process where the leaving group departs first, forming a carbocation intermediate, followed by nucleophilic attack.

Front

What is the S_N2 reaction mechanism?

Back

The S_N2 (Substitution Nucleophilic Bimolecular) reaction mechanism involves a single concerted step where the nucleophile attacks the substrate at the same time as the leaving group departs.

Front

What type of carbon is most likely to undergo an S_N1 reaction?

Back

Tertiary carbon is most likely to undergo an S_N1 reaction due to the stability of the carbocation formed.

Front

What type of carbon is most likely to undergo an S_N2 reaction?

Back

Primary carbon is most likely to undergo an S_N2 reaction because it is less sterically hindered, allowing easier access for the nucleophile.

Front

What factors affect the rate of an S_N2 reaction?

Back

The rate of an S_N2 reaction is affected by both the substrate and the nucleophile.

Front

How does steric hindrance affect S_N1 and S_N2 reactions?

Back

Steric hindrance significantly affects S_N2 reactions, making them slower for bulky substrates, while S_N1 reactions are less affected due to the formation of a carbocation.

Front

What is the reactivity order of halides in S_N2 reactions?

Back

The reactivity order of halides in S_N2 reactions is 1^o > 2^o > 3^o.

Front

What is a carbocation?

Back

A carbocation is a positively charged carbon atom that has only six electrons in its valence shell, making it highly reactive.

Front

What is the role of the nucleophile in S_N reactions?

Back

The nucleophile donates a pair of electrons to form a new bond with the substrate, facilitating the substitution reaction.

Front

What is the difference between a strong and a weak nucleophile?

Back

A strong nucleophile is highly reactive and readily donates electrons, while a weak nucleophile is less reactive and may require more favorable conditions to react.