Chemistry:Chain disproportionation

In chemistry, chain disproportionation occurs when two radicals meet, instead of coupling, they exchange a hydrogen atom. That gives two terminated chains, one saturated and the other with a terminal double bond.

2R-(CH₂CH₂)_n-CH₂CH₂• → R-(CH₂CH₂)_n-CH=CH₂ + R-(CH₂CH₂)_n-CH₂CH₃