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Electrophilic Addition and Bromohydrin FormationIntroductionAlkenes are electron rich, and due to the electron density of the π bond above and below the plane of the molecule, they act as nucleophiles in reactions. When 1-methylcyclohexene reacts with NBS in water and THF, NBS decomposes to Br2. The nucleophilic nature of the alkene will force the electron.