Calculate the degree of unsaturation for the following molecules: Molecule I: C₃H₄ Molecule II: C₅H₁₀ Molecule III: C₄H₆ A) For molecule I the degree of unsaturation is 2, for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 1.. B) For molecule I the degree of unsaturation is 2, for molecule II the degree of unsaturation is 0 and for molecule III the degree of unsaturation is 2. C) For molecule I the degree of unsaturation is 2, for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 2.. D) For molecule I the degree of unsaturation is 2, for molecule II the degree of unsaturation is 2 and for molecule III the degree of unsaturation is 2.. E) For molecule I the degree of unsaturation is 2, for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 1.

Question

Quizplus · Accepted Answer

The degree of unsaturation is calculated using the formula: 
Degree of unsaturation = (2n + 2) - (h + x + y + z)/2
Where n is the number of carbons, h is the number of hydrogen atoms, and x,y,z are the number of halogens, nitrogen, and phosphorus atoms respectively.

For molecule I: 
n=4, h=1, x=0, y=4, z=0
Degree of unsaturation = (2*4 + 2) - (1 + 0 + 4 + 0)/2 = 2

For molecule II:
n=5, h=1, x=0, y=5, z=0
Degree of unsaturation = (2*5 + 2) - (1 + 0 + 5 + 0)/2 = 1

For molecule III:
n=5, h=1, x=0, y=5, z=0
Degree of unsaturation = (2*5 + 2) - (1 + 0 + 5 + 0)/2 = 2

Therefore, the correct choice is C.

Calculate the Degree of Unsaturation for the Following Molecules