* Octane (C8H18): This is a major component of gasoline and is known for its high octane rating, which relates to its resistance to knocking in internal combustion engines.
* Octene (C8H16): This is an alkene, which means it contains a carbon-carbon double bond. There are multiple isomers of octene depending on the location of the double bond.
* Octanol (C8H18O): This is an alcohol with an eight-carbon chain. It's used as a solvent and in the production of other chemicals.
* Octanoic acid (C8H16O2): This is a carboxylic acid with an eight-carbon chain. It's found naturally in fats and oils and is used in the food industry.
Note: This is not an exhaustive list. There are many other chemicals in petroleum with eight carbon atoms, and their specific structures and properties will vary.
