Give the mechanism of Borodine Hunsdiecker Reaction. Also explain, why the yield of alkyl halide in this reaction follows the order primary secondary tertiary.

Hunsdieker reaction: The silver salts of carboxylic acids react with halogens in CCl₄ to give organic halides.


The mechanism is as follows:

The yield of alkyl halide in this reaction follows the order primary > secondary > tertiary. This is because the stability of radicals follows the order primary < secondary < tertiary. So, the primary radical being most reactive leads to maximum yield of primary halide.