# What is the purpose of halogen in oxidation of thiols?

Why do you need molecules like $\ce{Br2, I2}$ as one of the reagents in oxidation of thiols? I am saying this because when you look at the mechanism of reaction, it seems that you can have same product of disulfide by simply joining two protonated thiols (by strong base like $\ce{OH^{-}}$) together. Thanks.

• Probably so the electrons have somewhere to go. Feb 9 '17 at 16:32