Methylene 215061 212286061 2008-05-14T05:05:07Z Unfree 36267 Reworded entire article. [[Image:Methylene Chloride.PNG|thumb|right|75px|[[Dichloromethane]]]] [[Image:Methylenecyclopropene.png|thumb|right|75px|[[Methylenecyclopropene]]]] [[Image:Carbene.png|thumb|right|75px|[[Carbene]]]] '''Methylene''' is the chemical species, R<sub>2</sub>C:, named after [[methane]], in which two of the carbon atom's valence electrons form no bonds. The word is applicable to: * the −CH<sub>2</sub>− group present, for example, in [[dichloromethane]] (also known as methylene chloride), * the =CH<sub>2</sub> group, which occurs in [[methylenecyclopropene]], * and the :CH<sub>2</sub> molecule, a [[carbene]] known as methylene. A carbene is a highly reactive [[organic molecule]] having a [[valence (chemistry)|divalent]] [[carbon]] atom with six [[valence (chemistry)|valence]] electrons. Methylene groups in a chain or ring contribute to its size and [[lipophilicity]]. ==See also== *[[Methyl]] *[[Methylidyne]] [[Category:Functional groups]] {{organic-chem-stub}} [[de:Methylengruppe]] [[es:Metileno]] [[fr:Méthylène]] [[it:Metilene]] [[ja:メチレン基]] [[he:מתילן]] [[pt:Metileno]] [[sv:Metylengrupp]] [[zh:亚甲基]]