Question

which one of the following will react faster in SN2 displacement: 1-bromopentane or 2-bromopentane 1-bromo-2methylbutane or 2-bromo-2methylbutane

Answer 1

1-bromopentane will react faster in SN2 reaction because it is primary alkyl halide. Order of reactivities of alkyl halides in SN2 reaction -- 1°>2°>3°

Answer 2

Hey there,


● Answer -
1-bromopentane

● Explanation -
- Rate of SN2 reaction depends on steric hindrance around target atom.
- Higher the steric hindrance, slower the reaction.
- Therefore, compound with lowest steric hindrance (1-bromopentane) will show fastest SN2 reaction.
- Rate of reactivity towards SN2 reaction is -
1-bromopentane > 2-bromopemtane > 1-bromo-2-methylpentane > 2-bromo-2-methylpentane


Hope this helps you...