Question

In lecture, the professor names a molecule 4-ethylpentane. An alert student pointed out that although the correct structure could be drawn, the name did not follow systematic rules. What is the correct systematic name for the molecule?

Answer 1

C. 3-methylhexane.

Step-by-step explanation

In a systematic system of naming organic molecules, te longest chain wof carbon ill be considrered first.

So the longest chain of carbon in the molecule will be 6 (hexane) and not 5 (pentane).

The parent name of the molecule will be hexane.

The only methyl group left is bonded to carbon 3 (numbering in such a way the methyl group s given the least number possible).

Therefore, the correct name of the molecule is 3-methylhexane.

The answer is C. 3-methylhexane.