UV light splits the bromine molecule into two reactive radicals ... The rapid disappearance of the amber color of the bromine at room temperature is characteristic of reaction with alkenes. (colorless ...

This causes a smoky flame. Alkenes have a functional group C=C – the part of the molecule that takes part in reactions. Alkanes, in contrast, do not have a functional group and are less reactive ...

achieving the transformation of complex alkene molecules to oxonitriles and enabling precise editing of the molecular skeletons of drugs, natural products, and other complex molecules.