alkene

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alkene

(ăl`kēn), any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon double bonds (see chemical bondchemical bond,
mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the formation of an aggregate with sufficient stability to be regarded as an
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). Alkenes with only one double bond have the general formula CnH2n. In the International Union of Pure and Applied Chemistry (IUPAC) system of chemical nomenclature, the name of an alkene is derived from the name of the corresponding alkanealkane
, any of a group of aliphatic hydrocarbons whose molecules contain only single bonds (see chemical bond). Alkanes have the general chemical formula CnH2n+2.
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 by replacing the -ane alkane suffix with -ene and, if necessary, adding a prefix to indicate the location of the double bond in the molecule. The IUPAC name of the simplest alkene, H2C=CH2, is ethene, which is derived from ethane. Propene is related to propane. Two alkenes, 1-butene and 2-butene, are related to butane; these two compounds, which differ in the location of the double bond in their molecules, are structural isomersisomer
, in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of such compounds. Isomerism was first recognized by J. J. Berzelius in 1827.
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. In addition to these IUPAC names, many of the alkenes have common names, e.g., ethene is called ethylene and propene propylene. The alkenes as a group are sometimes called the ethylene series. Since the carbon-carbon double bond is sometimes called an olefinic linkage, the alkenes are sometimes called the olefins. Many of the reactions in which alkenes take part involve the cleavage of half the carbon-carbon double bond and subsequent formation of two single bonds, one to each of the adjacent carbon atoms. Such reactions include hydrogenation, with the formation of an alkane, and hydration, with the formation of an alcohol.

alkene

[′al‚kēn]
(organic chemistry)
One of a class of unsaturated aliphatic hydrocarbons containing one or more carbon-to-carbon double bonds.

alkene

a. any unsaturated aliphatic hydrocarbon with the general formula CnH2n
b. (as modifier): alkene series
References in periodicals archive ?
In an open letter to the Western Digital board, Alken Asset Management, claimed that Western Digital was simply paying too much for the flash drive maker.
9 percent, while Alken Maes said it would up its prices by about 6 percent from March 12.
Arthropods from the Lower Devonian (Lower Emsian) of Alken an der Mosel, Germany, Pt.
Ministers Daniel Herkovitch and Ozi Landaw, Knesset Members Ori Ariel; Zpholon Orleif; Ori Orbakh; Dani Danoun and Ze'ef Alken, the head of the municipality of "Ma'alleih Adomim" settlement, Bani Kesrael, and the leaders of the Settlement Council in the West Bank attended the ceremony.
Esta analise permite encarar os resultados na sua acecao de modelo global onde se encontram inerentes todas as variaveis independentes, pelo que a analise nao se limita a um resultado parcelar, mas sim a uma analise integrativa onde sao tidos em conta os efeitos de todas as variaveis para a auto-estima (Cohen, Cohen, West, & Alken, 2003).
14-The Healing Power of Forgiveness--Martha Alken, OP Nov.
The Magic of the Moselle Valley river cruise, meanwhile, takes in the picturesque villages of Alken, Cochem and Zell and also visits Trier and the famous Bernkastel market square.
But Alken, in various interviews where the subject has been broached, has chosen to neither confirm nor deny that he is gay.
El frontispicio, por diseno de Henry Thomas Alken y grabado de John Zeitten, procede de un set editado en 1831; 2 laminas con disenos de Coypel pertenecen al album publicado por Van der Gucht en Londres hacia 1725; otras 6, tambien con disenos de Coypel, estan extraidas del set original de Paris: Surugue, 1724; 3 laminas, que reproducen dibujos del mismo pintor frances, no parecen proceder de ninguna edicion o set concretos y, posiblemente, se trata de estampas que se vendian de forma independiente; 1 lamina, con diseno de Pierre Charles Tremoliers y grabado de Jacques van der Scheley, pertenece a la edicion de La Haya: Pierre de Hondt, 1746; y, por ultimo, 2 estampas de dibujante y grabador anonimos impresas por Antoine Radigues (Urbina y Smith 85-118).
The Scottish & Newcastle group comprises Scottish Courage in the UK, Brasseries Kronenbourg in France, Alken Maes in Belgium, Centralcer in Portugal and the pub and restaurant operator S&N Retail.