What is the IUPAC name for the following compound?
A)5-Ethyl-3,6-dimethylheptane
B)3-Ethyl-2,5-dimethylheptane
C)3-Ethyl-2,5-dimethyloctane
D)5-Ethyl-3,6-dimethyloctane

Question

What is the IUPAC name for the following compound? 
A)5-Ethyl-3,6-dimethylheptane 
B)3-Ethyl-2,5-dimethylheptane 
C)3-Ethyl-2,5-dimethyloctane 
D)5-Ethyl-3,6-dimethyloctane

Quizplus · Accepted Answer

The parent chain has 8 carbons, hence the suffix -octane. The position of substituents is determined by numbering the carbon chain from the end closest to the first substituent encountered. In this case, the ethyl group is at position 3 and the two methyl groups are at position 2 and 5, respectively. Therefore, the correct name is 3-ethyl-2,5-dimethylheptane.

What Is the IUPAC Name for the Following Compound