Question

Among the choices of alkyl bromide, the last reactive bromide in $S_{N}2$reaction is

• A. 1-Bromopentane
• B. 2-Bromo-2-methylbutane
• C. 1-bromo-3-methylbutane
• D. 1-bromo-2-methylbutane.

Answer 1

Answer: (B)

2-Bromo-2-methylbutane

Answer 2

The reactivity of different alkyl halides towards $S_{N}2$reaction decreases in the order.

Methyl halides > 1° halides > 2° halides > 3° halides.

}{(b) }{3{^\circ}halides}$$