Ethylene on reaction with bromine forms which product?

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Multiple Choice

Ethylene on reaction with bromine forms which product?

Bromine adds across the carbon–carbon double bond in alkenes through electrophilic addition, giving a vicinal dibromide. For ethylene, each carbon of the former double bond ends up bonded to a bromine, yielding 1,2-dibromoethane (structure: CH2Br–CH2Br). This happens via a bromonium ion intermediate and anti addition, so the two bromine atoms end up on adjacent carbons. Ethane would require removing the double bond (hydrogenation), not simply adding bromine.

Bromine adds across the carbon–carbon double bond in alkenes through electrophilic addition, giving a vicinal dibromide. For ethylene, each carbon of the former double bond ends up bonded to a bromine, yielding 1,2-dibromoethane (structure: CH2Br–CH2Br). This happens via a bromonium ion intermediate and anti addition, so the two bromine atoms end up on adjacent carbons. Ethane would require removing the double bond (hydrogenation), not simply adding bromine.

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