Transfer hydrogenation

Transfer hydrogenation is the addition of hydrogen (H; dihydrogen in inorganic and organometallic chemistry) to a molecule from a source other than gaseous H. It is applied in industry and in organic synthesis, in part because of the inconvenience and expense of using gaseous H. One large scale application of transfer hydrogenation is coal liquefaction using "donor solvents" such as tetralin.{{Cite journal