Question

$H_{3}C-C{H}_2-\stackrel{C{H}_3}{\stackrel{|}{C}=}CH-\underset{C_2{H}_5}{\underset{|}{C}H}-\stackrel{C{H}_3}{\stackrel{|}{CH}-}C{H}_2-C{H}_2-C{H}_3$

The correct IUPAC name of the compound :

• A. 5-Ethyl-3, 6-dimethylnon-3-ene
• B. 5-ethyl-4, 7-dimethyl non-3-ene
• C. 4-methyl-5, 7-diethyloct-2-ene
• D. 2,4-ethyl-5-methyl oct-2-ene

Answer 1

Answer: (A)

5-Ethyl-3, 6-dimethylnon-3-ene

The correct IUPAC name of the compound is 5-Ethyl-3, 6-dimethyl non-3-ene.
The parent carbon atom contains 9 carbon atoms and a double bond. Hence, it is non-3-ene.
An ethyl group is present on the fifth carbon atom and two methyl groups are present one on third carbon and other on sixth carbon atom.