Question

The IUPAC name of the compound H3C−CH|C2H5−CH|C2H5−CH3 is .

• A. 2,3-diethylbutane
• B. 3,4-dimethylhexane
• C. 2,3-methylpentane

Answer 1

The correct option is B 3,4-dimethylhexane

The compound can be written as

$\underset{1}{C{H}_3}-\underset{2}{C{H}_2}-\underset{3}{\stackrel{C{H}_3}{\stackrel{|}{CH}}}-\underset{4}{\stackrel{C{H}_3}{\stackrel{|}{CH}}}-\underset{5}{CH}-\underset{6}{C{H}_3}$
There are six carbons in the parent chain and hence the root word will be hex. If we look at the compound, only single bonds are present. So, the suffix will be -ane. There are two methyl groups present at the third and fourth carbon. Therefore, the IUPAC name of the compound is 3,4-dimethylhexane.