Ncert Exercises & Solutions

Out of o- and p-dibromobenzene which one has higher metting point and

why?

p-dibromoberzene shows more melting point than its o-isomer due to presence of symmetry. Due to

symmetry, para- isomer adjusts in the crystal lattice better than the ortho-isomer.

Therefore, p-dibromobonzene has higher metting point.