Alkene treated with bromine (Br2) yields which product?

Master NCEA Level 3 Organic Chemistry Reaction Schemes. Prepare with multiple choice questions, complete with hints and detailed explanations. Ace your exam with our comprehensive tools!

Multiple Choice

Alkene treated with bromine (Br2) yields which product?

When an alkene meets bromine, it undergoes electrophilic addition across the C=C bond. Bromine polarizes, and a bromonium ion forms; this intermediate is opened by bromide from the opposite face, giving two bromine atoms added to adjacent carbons in an anti (opposite-sided) fashion. The product is a vicinal dibromide, specifically 1,2-dibromoalkane. This outcome is specific to bromination of an alkene in a non-nucleophilic solvent; other products like an alkane, ether, or alcohol result from different reagents or reaction types, not from simple Br2 addition to an alkene.

When an alkene meets bromine, it undergoes electrophilic addition across the C=C bond. Bromine polarizes, and a bromonium ion forms; this intermediate is opened by bromide from the opposite face, giving two bromine atoms added to adjacent carbons in an anti (opposite-sided) fashion. The product is a vicinal dibromide, specifically 1,2-dibromoalkane. This outcome is specific to bromination of an alkene in a non-nucleophilic solvent; other products like an alkane, ether, or alcohol result from different reagents or reaction types, not from simple Br2 addition to an alkene.

More practice questions