alkene

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al·kene

 (ăl′kēn′)
n.
Any of a series of unsaturated, aliphatic hydrocarbons with a carbon-carbon double bond, having the general formula CnH2n.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

alkene

(ˈælkiːn)
n
(Elements & Compounds)
a. Also called: olefine or olefin any unsaturated aliphatic hydrocarbon with the general formula CnH2n
b. Also called: olefine (as modifier): alkene series.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

al•kene

(ˈæl kin)

n.
any member of the homologous series of unsaturated, aliphatic hydrocarbons having at least one double bond and the general formula CnH2n, as ethlyene. Also called olefin .
[1895–1900]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

al·kene

(ăl′kēn′)
Any of a group of hydrocarbons whose carbon atoms form chains linked by one or more double bonds. Alkenes have the general formula CnH2n and include ethylene. Also called olefin.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alkene - any unsaturated aliphatic hydrocarbon
aliphatic compound - organic compound that is an alkane or alkene or alkyne or their derivative
ethene, ethylene - a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
alkeen
alcène
alchene
alken
alceno
alken

alkene

[ˈælkiːn] nalcheno
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
The chemical feature of all haloolefins is the presence of a carbon-carbon double bond. This carbon-carbon double bond, in most cases, is more reactive than saturated carbon-carbon, carbon-hydrogen, and carbon-halogen (fluorine, chlorine, bromine, iodine) bonds.
A crosslinking molecule has a carbon-carbon double bond at its head, but unlike a normal monomer molecule it also has up to three additional carbon-carbon double bonds at other ends of the molecule; this means that the crosslinker will form bonds at more than one site, which enables the crosslinker to bind separate chains together and form a more rigid structure for the final polymer.
Key statement: A modified diene polymer is obtained by decomposing a diene polymer having a carbon-carbon double bond in a main chain by oxidative cleavage of the carbon-carbon double bond to reduce a molecular weight, changing acido-basic properties of a system containing polymer fragments obtained such that the system is changed into a basic system when the system is acidic and the system is changed into an acidic system when the system is basic to combine the polymer fragments, thereby obtaining an intermediate polymer having an altered structure, and epoxidizing a carbon-carbon double bond moiety of a main chain of the intermediate polymer.
The DC for each blend, polymerized and unpolymerized, was determined by the ratio of the absorbance peak corresponding to the aliphatic carbon-carbon double bond (1637 [cm.sup.-1] peak height) with that of the internal standard (1715, 1608, and 1582 [cm.sup.-1] peak height), according to methods described in a previous study.
When a carbon-carbon double bond exists, stereoisomers (a.k.a.
Catalytic hydrogenation indicated the presence of one carbon-carbon double bond. Reaction with methanolic HCl before derivatization with BSTFA produced a new peak with a molecular weight consistent with the replacement of one TMS group with a methyl group.
By targeting the carbon-carbon double bond, which is usually difficult to break, metathesis reactions provide "a new way to link molecules together," says Ronald Breslow, a chemist at Columbia University and Grubbs' Ph.D.
Key statements polymer having a carbon-carbon double bond in a main chain is decomposed by subjecting the carbon-carbon double bond to oxidative cleavage using an oxidizing agent such as periodic acid to decrease the molecular weight, polymer chains of the decomposed polymer are combined by changing acido-basic properties such that a system containing the decomposed polymer becomes basic when acidic and becomes acidic when basic, and a modified polymer in which the structure has been changed is obtained.