👉 The term 'naphthene' refers to a class of aromatic hydrocarbons that have a double bond between two carbon atoms. Naphthenes are commonly used in organic chemistry, as they are found in many natural products such as naphtha (a common fuel), and also as industrial chemicals like naphthyl compounds. In the context of organic synthesis, naphthene is often used to synthesize new aromatic rings, or "naphthalenes," which are the