What is the correct IUPAC name for the following molecule?
A) 1-ethyl-2-methylhexane
B) 2-ethyl-1-methylcycloheptane
C) 4-ethyl-5-methylcyclohexane
D) 1-ethyl-2-methylcyclohexane
E) 1-methyloctane

Question

What is the correct IUPAC name for the following molecule? 
A) 1-ethyl-2-methylhexane 
B) 2-ethyl-1-methylcycloheptane 
C) 4-ethyl-5-methylcyclohexane 
D) 1-ethyl-2-methylcyclohexane 
E) 1-methyloctane

Quizplus · Accepted Answer

The longest carbon chain in the molecule is a six-membered ring, which is a cyclohexane. There are two substituents on the ring: an ethyl group (C2H5) and a methyl group (CH3), which are located at C1 and C2, respectively. According to the rules of alphabetical order, ethyl should come before methyl, so the name is 1-ethyl-2-methylcyclohexane.

What Is the Correct IUPAC Name for the Following Molecule