Alkene decolourisation of bromine water

Numéro d’image : 11520236
Alkene decolourisation of bromine water
Alkene decolourisation of bromine water. Image 3 of 3. End result of the reaction of bromine water (Br2) with ethene (C2H4,a gaseous alkene) in a test tube. The ethene has been bubbled into the bromine water through the glass tube seen in the test tube. This is an electrophilic addition reaction that has decolourised the bromine. The bromine adds across the ethene double bond,producing the colourless 1,2-dibromoethane (C2H4Br2). This reaction is used to demonstrate the reactivity of the alkene double bond. In contrast,single-bonded alkanes do not react with bromine unless ultraviolet light is used to initiate the reaction. For a sequence of the decolourisation,see images A500/725-727
Licence : Droits gérés
Crédit: Science Photo Library / Andrew Lambert Photography
Taille de l’image : 3543 px × 4936 px
Model Release : Non requis
Property Release : Non requis
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