Question

p-Dichlorobenzene has higher m.p. than those of o- and m-isomers. Discuss.

Answer 1

Answer:

Explanation:

p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. ... 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.

Answer 2

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p-Dichlorobenzene has higher m.p. and solubility than those of o- and m-isomers.

This is because p-isomer is more symmetrical and hence magnitude of molecular forces of attraction are stronger, therefore, the p-isomer melts at a higher temperature and has comparatively more solubility.