Sn2 has carbocation intermediate?

[Oh_Gee]

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from GS-10

from these 2 explanations, they are saying sn2 reactions have carbocation intermediates???? since when?

 

[Teleologist]

Why do you think these are SN2 reactions?

 

[Oh_Gee]

Why do you think these are SN2 reactions?

well in retrospect i guess #11 is sn1 since Cl- is a weak base

but in the explanation for #12, it says
"SN2 reactions require a good leaving group to create a carbocation"

 

[Teleologist]

Chloride ion is a good nucleophile in water precisely because it's a weak Bronsted base.

 

[Oh_Gee]

Chloride ion is a good nucleophile in water precisely because it's a weak Bronsted base.

so reaction 1 is SN2 then?

 

[Teleologist]

It can't be if there's a carbocation

 

[Oh_Gee]

It can't be if there's a carbocation

so why does the explanation say "SN2 reactions require a good leaving group to create a carbocation"

 

[Teleologist]

That's wrong.

 

[Oh_Gee]

That's wrong.

koo just making sure.
product 1 was formed by SN1 and product 2 is formed by SN2 right?