Bromine water is an orange solution of bromine. It becomes colourless when it is shaken with an alkene. Alkenes can decolourise bromine water, but alkanes cannot. The slideshow shows this process.

The rapid disappearance of the amber color of the bromine at room temperature is characteristic of reaction with alkenes. (colorless) (purple) (colorless ...

Despite progress in developing enantioselective Kharasch-Sosnovsky reactions, most reported reactions have limitations, including a narrow substrate scope on the simple cyclic alkenes, low-to ...