Question

n-butyl bromide has higher boiling than t-butyl bromide. Why?

Answer 1

The boiling point of n-butyl bromide is higher than that of t-butyl bromide because n-butyl bromide is a straight chain molecule having larger surface area and therefore, has stronger intermolecular forces. On the other hand, t-butyl bromide is branched molecule, so it has a smaller surface area. Hence, it has weaker intermolecular force. Thus, n- Butyl bromide has higher boiling point than t-butyl bromide.

Answer 2

Hey !!

n-Butyl bromide being a straight chain alkyl halide has larger surface area than tert. butyl bromide. Larger the surface area, larger the magnitude of the van der Waal's forces and hence higher is the boiling point.

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