BRAINCAKEReaction with Halogens
Alkenes react readily with halogens at room temperature and in the dark. The reaction of alkenes with bromine is used as a test for a C=C double bond. Alkenes will turn bromine water from orange to colourless. The mechanism of the reaction is electrophilic addition.
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Key terms in this lesson
- heterolytic fission
- The breaking of a covalent bond in which both electrons of the bonded pair go to the same atom, forming a positive and a negative ion.
- carbocation
- A positively charged carbon-containing ion, formed when a carbon atom has only three bonds and a positive charge.
More in Alkenes
- Bonding in Alkenes
- Stereoisomerism in Alkenes
- Reactions of Alkenes
- Hydrogenation
- Reaction with Hydrogen Halides
- Reaction with Steam
- Oxidation of Alkenes to Diols
- Addition Polymerisation
All 11 lessons in Alkenes · All OCR A-level Organic Chemistry topics