Dehydrogenation 1034265 223040313 2008-07-02T08:53:42Z Itub 426390 [[dehydrogenase]]s. '''Dehydrogenation''' is a chemical reaction that involves the elimination of [[hydrogen]] (H<sub>2</sub>). It is the reverse process of [[hydrogenation]]. Dehydrogenation reactions may be either large scale industrial processes or smaller scale laboratory procedures. There are a variety of classes of dehydrogenations: *Aromatization - Six-membered [[alicyclic compound|alicyclic]] rings can be aromatized in the presence of hydrogenation catalysts, the elements [[sulfur]] and [[selenium]], or [[quinone]]s (such as [[DDQ]]). *Oxidation - The conversion of [[alcohol]]s to [[ketone]]s or [[aldehyde]]s can be effected by metal catalysts such as [[copper chromite]]. In the [[Oppenauer oxidation]], hydrogen is transferred from one alcohol to another to bring about the oxidation. *Dehydrogenation of amines - [[amine]]s can be converted to [[nitrile]]s using a variety of [[reagent]]s, such as IF<sub>5</sub>. *Dehydrogenation of [[paraffin]]s and [[olefin]]s - paraffins like n-[[pentane]] and [[isopentane]] can be converted to [[pentene]] and [[isoprene]]. Dehydrogenation converts saturated fats to unsaturated fats. Enzymes that catalyze dehydrogenation are called [[dehydrogenase]]s. ==References== *''Advanced Organic Chemistry'', Jerry March, 1162-1173. [[Category:Elimination reactions]] [[Category:Hydrogen]] {{reaction-stub}} [[et:Dehüdrogeenimine]] [[es:Deshidrogenación]] [[fr:Déshydrogénation]] [[he:דהידרוגנציה]] [[no:Dehydrogenering]] [[pl:Odwodornienie]] [[pt:Dehidrogenação]] [[ru:Дегидрогенизация]] [[uk:Дегідрогенізація]] [[zh:脱氢]]