Question

The IUPAC name of given compound is:

$H_{3}C-C{H}_2-\underset{C{H}_{2}C{H}_3}{\underset{|}{C}H-}C{H}_2-\underset{C{H}_3}{\underset{|}{C}H}-C{H}_{2}C{H}_3$ is

• A. $3-$ethyl$-5-$methylheptane
• B. $5-$ethyl$-3-$methylheptane
• C. $3,5-$diethylhexane
• D. $1,3-$diethyl$-1-$methylpentane

Answer 1

The correct option is A $3-$ethyl$-5-$methylheptane

The IUPAC name of given compound is 3−5−ethyl−5−−3−methylheptane. Explanation: The parental chain is of 7 carbons with single bonds hence it is heptane. Two substituents ethyl and methyl group are attached from an equal distance. Hence according to the alphabetical order preference, counting starts from carbon which is close to an ethyl group.