Bromine & Alkenes
2 guided lessons · 18 checks · 4. Organic Chemistry → Alkenes
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Bromine adds across the double bond
Alkenes take simple molecules onto their double bond, and bromine is the textbook partner. This lesson watches bromine add across C=C and generalises the move to every halogen and alkene pair.
What you know already
From Alkenes you already know the C=C double bond opens to add new atoms. This note runs the classic classroom reaction: bromine adding across that bond to give dibromoalkanes, and the same chemistry in water form as the orange bromine water test that tells alkenes from alkanes in one shake.
Key points of understanding
- Alkenes undergo addition reactions in which atoms add across the C=C double bond.
- When bromine reacts with an alkene, a dibromoalkane is formed.
- Bromine plus ethene gives dibromoethane, with one bromine on each of the two carbons.
- The same addition works for any halogen with any alkene, atoms always adding across the C=C.
- No other products form: both bromine atoms end up bonded, one to each carbon of the old double bond.
Bromine atoms add across the C=C in the addition reaction of ethene and bromine
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1.Bromine adds across the double bond
Alkenes take simple molecules onto their double bond, and bromine is the textbook partner. This lesson watches bromine add across C=C and generalises the move to every halogen and alkene pair.
Bromine atoms add across the C=C in the addition reaction of ethene and bromine
Key points
- Alkenes undergo addition reactions in which atoms add across the C=C double bond.
- When bromine reacts with an alkene, a dibromoalkane is formed.
- Bromine plus ethene gives dibromoethane, with one bromine on each of the two carbons.
Guided content from the SME authoring corpus — note rn_DBGf3WVffDBNDp4R, pinned at 52acc7ec1650 · promoted SyllabAI/syllabai-resources e967e75f1339
