Hydrogenation


Hydrogenation is a class of chemical reactions which result an addition of hydrogen (H<sub>2</sub>) usually to unsaturated organic compounds. Typical substrates include alkenes, alkynes, ketones, nitriles, and imines.[1] Most hydrogenations involve the direct addition of diatomic hydrogen (H<sub>2</sub>) but some involve the alternative sources of hydrogen, not H<sub>2</sub>: these processes are called transfer hydrogenations. The reverse reaction, removal of hydrogen, is called dehydrogenation.