Theoretically 2-methylhexane also burns with a less sooty flame, emitting higher-frequency radiation; however, as heptane and 2-methylhexane differ by only one carbon atom, in terms of branching, both burn with a bright yellow flame when ignited.
Theoretically, 2-methylhexane burns with a less sooty flame, emitting higher-frequency radiation; however, as heptane and 2-methylhexane have the same level of branching, they both display a similar characteristic of producing a bright yellow flame when ignited.