Question

The number of C atoms present in allyl vinyl acetylene is ____ and it has _______ degree of unsaturation.

• A. $7$ and $4$
• B. $5$ and $4$
• C. $7$ and $3$
• D. $5$ and $3$

Answer 1

Answer: (A)

Correct option: (A)

Allyl carbon is a carbon atom that is attached to a doubly bonded carbon atom.

Vinylic carbon is a carbon atom that is doubly bonded to another carbon atom.

Acetylene is the simplest compound of the alkyne series containing two carbon atoms attached through a triple bond.

The structural formula of Allyl vinyl acetylene

$\underset{allyl}{\underset{}{C{H}_2=CH-C{H}_2}}-\underset{acetylene}{\underset{}{C\equiv C}}-\underset{vinyl}{\underset{}{CH=C{H}_2}}$

No.of Carbon atoms $=7$

$1$ double bond $=1\pi$ bonds

$1$ triple bond $=2\pi$ bonds

Degree of unsaturation = No. of $\pi$ bonds $=1+2+1=4$