Nonein

Nonein is a chemical compound, specifically an unsaturated hydrocarbon with the molecular formula C9H16. It is an isomer of nonene, meaning it has the same number of atoms but arranged differently. The "none" part of the name indicates nine carbon atoms, and the "in" suffix signifies the presence of a carbon-carbon double bond. The precise position of this double bond determines the specific isomer of nonein, and there are various possible positional and geometric isomers. For example, 1-nonein has the double bond at the first carbon, while 2-nonein has it at the second. Geometric isomerism (cis and trans) can also exist depending on the substituents around the double bond.

Nonein is a colorless liquid at room temperature and pressure. Like other alkenes, it undergoes addition reactions due to the reactivity of the double bond. These reactions can include hydrogenation, halogenation, and hydrohalogenation, leading to the formation of saturated hydrocarbons or halogenated derivatives. Nonein can be synthesized through various methods, often involving the dehydration of nonanol or the cracking of larger hydrocarbons. Its applications are generally limited and often related to its use as a chemical intermediate in the synthesis of other organic compounds. It may also be found as a component in certain complex hydrocarbon mixtures. The environmental impact and toxicity of nonein are not extensively documented, but as with many volatile organic compounds, inhalation of high concentrations should be avoided.