Question

The correct IUPAC name of $C{H}_3-C{H}_2-CH\left(C{H}_3\right)-CH(C_2{H}_5{)}_2$ is:

• A. 4-ethyl-3-methylhexane
• B. 3-ethyl-4-methylhexane
• C. 4-methyl-3-ethylhexane
• D. 2,4 - diethylpentane

Answer 1

The correct option is B 3-ethyl-4-methylhexane

Solution:

List of some rules for nomenclature

• First we have to find out the long chain and name it.
• Then look for the side chains and functional groups.
• If the chains of equal length are engaging for selection of the parent chain, the selection goes in the series to:

(i) the greatest number of side chains having by the parent chain.

(ii) the chain whose substituent have the lowest numbers.

(iii) the greatest number of carbon atoms in smaller side chain having by the chain.

(iv) the least branched side chains having by the chain.

The IUPAC name of the compound $C{H}_3-C{H}_2-CH\left(C{H}_3\right)-CH(C_2{H}_5{)}_2$ is 3-ethyl-4-methylhexane.

Hence, the correct option is (B).