- Joined
- May 18, 2009
- Messages
- 444
- Reaction score
- 29
I originally thought that the reason for the protic polar solvent in SN1 reactions was to "weaken" the nucleophile to give time for the leaving group to detach from the electrophile.
But as I am reading a passage from BR, they note that "the strength of a nucleophile cannot be determined from an SN1 reaction, because the rate of the reaction only depends on the leaving group."
Which I then learned that the purpose of the solvent was to stabilize the cation intermediate of the SN1.
So I am wondering, in case I encounter such a question,
Is the purpose of the protic quality of the polar solvent to:
A.) Weaken the nucleophile AND stabilize the cation intermediate
or
B,) Just to stabilize the cation intermediate?
I know that the polar solvent serves to weaken the nucleophile for SN2. But am wondering if the protic quality is to enhance this dampening, or for a new purpose.
But as I am reading a passage from BR, they note that "the strength of a nucleophile cannot be determined from an SN1 reaction, because the rate of the reaction only depends on the leaving group."
Which I then learned that the purpose of the solvent was to stabilize the cation intermediate of the SN1.
So I am wondering, in case I encounter such a question,
Is the purpose of the protic quality of the polar solvent to:
A.) Weaken the nucleophile AND stabilize the cation intermediate
or
B,) Just to stabilize the cation intermediate?
I know that the polar solvent serves to weaken the nucleophile for SN2. But am wondering if the protic quality is to enhance this dampening, or for a new purpose.