page 43 Flashcards
What type of reaction is described in the
S
N
2
S
N
2 mechanism
?
A: Substitution nucleophilic bimolecular reaction.
How many steps are involved in an
SN2 mechanism?
A: One step.
What happens simultaneously in the
SN2 reaction mechanism?
A: The C–Br bond breaks as the C–O bond forms
What is used to represent the flow of electrons in the
SN2 mechanism?
A: Curved arrow notation.
What is the rate equation for an
SN2
reaction?
A: Rate =
k
[
nucleophile
]
[
alkylhalide
]
k[nucleophile][alkylhalide].
What happens to the leaving group in an
S
N
2
S
N
2 reaction?
A: It departs as a negatively charged ion (e.g.,
B
r
−
Br
−
).
In the
SN2 mechanism, what does the nucleophile attack?
A: The electrophilic carbon atom attached to the leaving group.
Why is the
SN2 reaction mechanism considered bimolecular?
A: Because the rate depends on the concentration of both the nucleophile and the substrate.
What type of stereochemical outcome can result from an
SN2 reaction?
A: Inversion of configuration at the carbon atom.
What type of bond is formed during the
SN2 mechanism?
A: A new covalent bond between the nucleophile and the carbon.
