Unimolecular ethanol decomposition and H atom abstraction from ethanol result in branch chain reaction, the development of branch chain reaction is determined by the isomers of C2H5O.

• 乙醇氧化经裂解反应、脱氢反应最终形成支链反应，乙氧基C2H5O的三种同分异构体在链分支中决定了链分支的进行方向。