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

Answer: (B)

Explanation: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.

Hence, option (B) is correct.