Isomerism and StereochemistryhardMCQ MULTIPLE

Which of the following pairs of molecular formulas represent compounds that have the exact SAME DegrIsomerism and Stereochemistry Chemistry Question

Question

Which of the following pairs of molecular formulas represent compounds that have the exact SAME Degree of Unsaturation (DU)?

Answer: A,C,D

💡 Solution & Explanation

Option A: Benzene ($C_6H_6$) has DU = 4. Toluene ($C_7H_8$) has DU = $7+1 - 8/2 = 4$. Option C: $C_3H_6O$ has DU = $3+1 - 6/2 = 1$ (oxygen is ignored). $C_3H_6$ has DU = $3+1 - 6/2 = 1$. Option D: $C_6H_{14}$ has DU = 0. $C_2H_4Cl_2$ has DU = $2+1 - 6/2 = 0$. Option B is incorrect: $C_5H_{10}$ has DU = 1, while $C_4H_6$ has DU = 2.

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