What is the structure of isooctane?

Isooctane, also known as 2,2,4-trimethylpentane, has the chemical formula C8H18. Its structure consists of a five-carbon pentane backbone with three methyl (–CH3) branches attached to the second and fourth carbons. This branching contributes to its properties, including its high octane rating, making it a common reference fuel in the automotive industry. The molecular structure can be visually represented as a central chain of five carbon atoms with three additional methyl groups extending from it.