Calculate the Index of Hydrogen Deficiency (IHD) for a compound having the simple molecular formula — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

The Index of Hydrogen Deficiency (IHD) is mathematically identical to DU. Using the formula $IHD = C + 1 - H/2$, we have $4 + 1 - 8/2 = 5 - 4 = 1$. The compound has an IHD of 1, meaning it contains either one double bond (alkene) or one ring (cycloalkane).