What does Br2 HV do?

1) Initiation: The Br2 single bond is broken by high energy ligh (hv) to form radicals placing one electron on each atom. 2) Propagation: (Hint: One radical reacts with a single bond to form another radical, thus propagating the radical species to drive the reaction forward.

What does Br2 do in a reaction?

Description: Treatment of alkenes with bromine (Br2) gives vicinal dibromides (1,2-dibromides). Notes: The bromines add to opposite faces of the double bond (“anti addition”). Sometimes the solvent is mentioned in this reaction – a common solvent is carbon tetrachloride (CCl4).

What is the difference between NBS and Br2?

NBS is used as a substitute for Br2 in these cases since Br2 tends to react with double bonds to form dibromides. The advantage of NBS is that it provides a low-level concentration of Br2, and bromination of the double bond doesn’t compete as much.

What is benzylic bromination?

Benzylic bromination – free-radical bromination of the alkyl group adjacent to an aromatic ring. Benzylic oxidation – complete oxidation of an alkyl group adjacent to benzene to a carboxylic acid.

Which is a diatomic bromine dibromide or Br2?

Dibromide (.1-) Br2 (.-) [Br2] (.-) Dibromide (.1-) is an inorganic radical anion and a diatomic bromine.

What does Br2 stand for in Urban Dictionary?

Demolition began on four of the property’s oldest office buildings, known as Bishop Ranch 2, or BR2. Replacing them will be City Center Bishop Ranch, a reinvention of the American suburban shopping center.

Which is the most stable Br2 or HV?

I learned that Br2, hv will swap Br with H from a carbon that will form the most stable radical. In the first reaction, the one that I marked with green is tertiary carbon that will form the most stable radical, so that’s where Br attacks.

Why does HBR generate only one equivalent of Br 2?

Since one equivalent of HBr generates one equivalent of Br 2, Br 2 will be generated only after the completion of Propagation Step #1.*** This keeps the concentration of Br 2 low and allows the free-radical reaction to out-compete the alkene addition reaction.