How many elements of unsaturation are implied by the molecular formula C₆H₁₂?

Question

Quizplus · Accepted Answer

To calculate the number of elements of unsaturation, we use the formula:
Elements of unsaturation = (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.
In this case, we have:
C= 134
H= 114
S= 2
Elements of unsaturation = (2(134) + 2 - 0 - 114 - 2)/2
Elements of unsaturation = (268 + 2 - 114 - 2)/2
Elements of unsaturation = 78/2
Elements of unsaturation = 39
However, since we have two sulfur atoms, we must subtract 2 from the total number of elements of unsaturation.
Elements of unsaturation = 39 - 2 = 37
Since there is only one element of unsaturation for each double bond or ring, the answer is B, which indicates that there is one double bond or ring in the molecule.

How Many Elements of Unsaturation Are Implied by the Molecular