MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryAlkyl and Aryl HalidesE elimination follows an antiperiplanar structure

Which of the following has the highest normal boiling point?

A.iodobenzene✓ Correct

B.bromobenzene

C.chlorobenzene

D.fluorobenzene

Explanation

There is an increase in boiling point as we move from chloride to a bromide to an iodide (for a given number of carbon atoms) is because of the increase in the number of electrons leading to larger dispersion forces. Hence, the maximum boiling point will be of iodobenzene.

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