Question:
p-Dichlorobenzene has higher m.p.than those of o- and m-isomers.Discuss.
p-Dichlorobenzene has higher m.p.than those of o- and m-isomers.Discuss.
Updated On: Sep 26, 2023
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Solution and Explanation
p-Dichlorobenzene is more symmetrical than o-and m-isomers. For this reason, it fits more closely than o-and m-isomers in the crystal lattice. Therefore, more energy is required to break the crystal lattice of p-dichlorobenzene. As a result,p-dichlorobenzene has a higher melting point and lower solubility than o-and m-isomers.
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