Q45 of 97 Page 142

Out of o-and p-dibromobenzene which one has higher melting point and why?

Out of the two compounds, p-dibromobenzene has the higher melting point. This is because the symmetry of p-dibromobenzene which makes the molecule fit better in crystal lattice. Due to this, it requires a higher temperature to break the bonds between the molecules and thus has a higher melting point.


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