Which alkyl halide would you expect to undergo an SN2 reaction most slowly?

Question

1-bromo-4-methylpentane
1-bromo-3-methylpentane

1-bromo-2-methylpentane

1-bromo-2,2-dimethylbutane

I am really confused with this topic and no I have been reading up on it, but I do not know how to approach such a question


1-bromohexane

Answer 1

Actually I just read something up on how it depends on the nature of the carbon atom as in if it is a primary carbon or tertiary?
With tertiary forming a more stable carbocation