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LeBonyt
2 years ago

The others have already said it. The light splits the bromine homolytically into radicals. These are very reactive and again cleave the hydrogen bond on the hexane. A radical forms again, which again cleaves a bromine molecule, etc.

https://www.chemie.de/lexikon/Radikale_Substitution.html

Alvin170
2 years ago

If I remember correctly, there is a substitution between the H atoms of hexane and bromine. The energy of the irradiation light is used for conversion.

Br2 + C9H20 (aq) -> HBr + BrC9H19 (or more bromine atoms, depending on how often substituted)

MeisterRuelps, UserMod Light

Radical substitution. 🙂 that is the keyword