Calculate the index of hydrogen deficiency for the following formula: C₈H₁₂NOF₂^-.

Question

Quizplus · Accepted Answer

The index of hydrogen deficiency (IHD) is calculated using the formula:
IHD = (2C + 2 + N - X - H)/2
where C is the number of carbons, N is the number of nitrogens, X is the number of halogens, and H is the number of hydrogens.
For the given formula, 
C = 18+1+1+1+12+1 = 34
N = 1
X = 1+1 = 2
H = 12+1+1 = 14
IHD = (2(34) + 2 + 1 - 2 - 14)/2 = 16/2 = 8 
However, because the formula is divided by 2, the actual index of hydrogen deficiency is 8/2 = 4. Therefore, the answer is C) 2, as this is the closest option to 4.

Calculate the Index of Hydrogen Deficiency for the Following Formula