Alkene

In organic chemistry, an alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond. The simplest acyclic alkenes, with only one double bond and no other functional groups, form an homologous series of hydrocarbons with the general formula CnH2n.

The simplest alkene is ethylene (C2H4), which has the International Union of Pure and Applied Chemistry (IUPAC) name ethene. Alkenes are also called olefins (an archaic synonym, widely used in the petrochemical industry). For bridged alkenes, the Bredt's rule states that a double bond cannot be placed at the bridgehead of a bridged ring system, unless the rings are large enough. Aromatic compounds are often drawn as cyclic alkenes, but their structure and properties are different and they are not considered to be alkenes.

Read more about AlkenePhysical Properties, Reactions

Other articles related to "alkene, alkenes":

Pauson–Khand Reaction
... is a chemical reaction described as a cycloaddition between an alkyne, an alkene and carbon monoxide to form a α,β-cyclopentenone ... With asymmetrical alkenes or alkynes regioselectivity is always an issue, but less so with intramolecular reactions ... The order of reactivity for the alkene is strained cyclic alkene > terminal alkene > disubstituted alkene > trisubstituted alkene ...
Meerwein Arylation - Scope
... A reported reaction of alkene acrylic acid with an aryl diazonium salt and copper(I) bromide and hydrobromic acid yields the alpha bromo-carboxylic acid ... When the alkene is butadiene the initial reaction product with catalyst copper(II) chloride is a 4-chloro-2-butene and after an elimination the aryl substituted butadiene ... arylation the diazonium salt is formed from 2-nitroaniline, the alkene isopropenyl acetate is an adduct of propene and acetic acid and the reaction product 2-nitrophenylacetone ...
Neighbouring Group Participation - NGP By An Alkene
... The π orbitals of an alkene can stabilize a transition state by helping to delocalize the positive charge of the carbocation ... Even if the alkene is more remote from the reacting center the alkene can still act in this way ... For instance in the following alkyl benzenesulfonate the alkene is able to delocalise the carbocation ...
Classes of Metallacycles - Metallacyclobutanes
... intermediates are involved in the alkene metathesis and in the oligomerization and dimerization of ethylene ... In alkene metathesis, the Chauvin mechanism invokes the attack of an alkene at an electrophilic metal carbene catalyst ...