Question

Find the degree of unsaturation for the following compounds A, B, C and D respectively :
A.
B.
C. D.

• A. 2,4,4,2
• B. 1,3,3,2
• C. 4,2,2,4
• D. 2,4,4,3

Answer 1

The correct option is A 2,4,4,2

Degree of unsaturation (DOU/DU) is Sum of the number of π bonds and rings in a compound.
In compound A one π bonds and one rings so DU is two.
In compound B three π bonds and one rings so DU is four.
In compound C three π bonds and one rings so DU is four.
In compound D two π bonds and zero rings so DU is two.