Question

Which isomer of bromobutane has the lowest boiling point?

Answer 1

Tertiary butyl bromide (${\mathrm{C}}_4{\mathrm{H}}_9\mathrm{Br}$):

1. Its boiling point drops as its branching increases.
2. It becomes more spherical as its surface area falls.
3. It's a branch to a molecule and has a smaller surface area.
4. Tertiary butyl bromide has lesser intermolecular interactions.
5. A lower boiling point results from reduced intermolecular forces as a result.
6. Due to its maximum branching, tertiary butyl bromide will have the lowest boiling point.

Final Anwer:

Tertiary butyl bromide (${\mathrm{C}}_4{\mathrm{H}}_9\mathrm{Br}$) isomer of bromobutane has the lowest point.