Calculate the Degree of Unsaturation (DU) for a highly chlorinated benzene derivative with the molec — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

The formula for DU is $DU = (C + 1) - \frac{H + X - N}{2}$. For $C_6H_3Cl_3$, Carbon ($C$) = 6, Hydrogen ($H$) = 3, Halogens ($X$) = 3 ($Cl$), Nitrogen ($N$) = 0. Substituting these values: $DU = (6 + 1) - \frac{3 + 3 - 0}{2} = 7 - \frac{6}{2} = 7 - 3 = 4$. This is consistent with a benzene ring which has 1 ring and 3 pi bonds ($1 + 3 = 4$).