Question

What is the degree of unsaturation of Q?

Answer 1

In the following reaction, compound Q is obtained from compound P via an ionic intermediate.

P + -----(conc. H₂SO₄) ---> Q ( A colored compound)

what is the degree of unsaturation of Q ?

solution : this is example of elimination reaction of alcohol.

see figure, here after reaction clearly shown how compound Q is formed.

now we have to find the degree of unsaturation of compound Q.

degree of unsaturation also known as double bond equivalent. it can be found by using formula, DoU = (2C + 2 + N - X - H)/2

here C = no of C - atoms

N = no of N atoms

X = no of halogens ( F, Cl, Br etc...)

H = no of H - atoms

here, C = 25 , N = 0, X = 0 , H = 16

so, DoU = (2 × 25 + 2 - 16)/2 = 18

Therefore degree of unsaturation of Compound Q is 18