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Dipole Moment of Chlorobenzene is Lower than that of Cyclohexyl Chloride - Chemistry

The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride

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Solution

Reasons behind the dipole moment of chlorobenzene being lower than that of cyclohexyl chloride are follows:

(a) In chlorobenzene, the C−Cl bond is shorter due to partial double bond character.

(b) Hybridisations of C in C−Cl in ​chlorobenzene and cyclohexyl chloride are sp2and sp3, respectively (sp2 C being more electronegative than sp3 C).

As dipole moment is the product of charge and bond distance, both the factors in chlorobenzene are lower as compared to cyclohexyl chloride. Therefore, the dipole moment of chlorobenzene is lower than that of cyclohexyl chloride.

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