Alkenals, addition reactions dipole moments

Other organic reactions take place between completely uncharged molecules with no dipole moments. One of the old tests for unsaturation was to treat the compound with bromine water. If the brown colour disappeared, the molecule was unsaturated. We don t use tests like these any more (spectroscopy means we don t need to) but the reaction is still an important one. A simple symmetrical alkene combines with symmetrical bromine in a simple addition reaction. 

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See also in sourсe #XX -- [ ]

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