What is 3-ethyl pentane?

3-ethyl pentane is a branched chain hydrocarbon with the chemical formula C7H16. It is also known as 1-methylhexane, which refers to its position in the alkane series. It is a colourless, flammable liquid with a boiling point of 98°C and a density of 0.71 g/mL.

The '3-ethyl' in its name indicates that there is an ethyl group attached to the third carbon of the pentane chain. This gives the molecule its branched shape, which affects its physical and chemical properties. It is slightly soluble in water and is commonly used as a solvent in chemical reactions and industrial processes.

3-ethyl pentane is also an important ingredient in gasoline, where it acts as an octane booster. It has a higher octane rating than straight chain molecules, such as heptane and octane, which are also found in gasoline. The high octane rating of 3-ethyl pentane helps prevent knocking or pinging in the engine, improving fuel efficiency and performance.