Binene

Binene is a non-systematic, informal name that has been used in chemical and industrial contexts to refer loosely to hydrocarbons containing two carbon–carbon double bonds. The term does not correspond to a single, well-defined compound under modern IUPAC nomenclature and may denote a range of isomeric dienes, cyclic or acyclic, depending on historical or commercial usage.

In chemistry, compounds sometimes labeled as "binene" belong to the broader class of dienes. Such molecules differ in carbon skeleton, substitution pattern and geometry of their double bonds, and therefore in physical properties and reactivity. Dienes participate in characteristic reactions such as polymerization, hydrogenation and cycloaddition (for example, Diels–Alder reactions), and specific behavior must be inferred from a precise structural name rather than the ambiguous label "binene."

The name appears sporadically in older patents, trade literature and some analytical reports, where it may be applied as a shorthand or product name. Because of its ambiguity, modern scientific and regulatory communications favor unambiguous systematic names or structural formulas. Readers encountering the term are advised to consult the original context or analytical data to determine the exact chemical identity intended.

"Binene" is sometimes confused with or is a misspelling of pinene, a well-defined monoterpene; the two are distinct and should not be conflated.