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 ?
At higher temperatures, plenty of alkyls depart from kerogen, and the amount of alkenes increases.
As we transition our long-term business model to commercializing breakthrough chemical platforms, including brand new technology based on 1,1-disubstituted alkene monomers, we wanted the company's name and brand to reflect our evolution," said Jeff Uhrig, CEO of Sirrus.
1] of OC) was also enriched in pyrogenic SOM with a high contribution of BN markers, and in an aliphatic component with particularly high contributions of branched alkenes from an aliphatic SOM fraction, possibly in part pyrogenic.
Whereas this is true for the majority of type-2 alkene electrophiles, physiochemical characteristics such as steric hindrance imposed by tertiary structure, solubility, and acid-base equilibrium can influence predictions of toxic potency based on HSAB parameters (reviewed by LoPachin et al.
In scientists' view, a group of chemicals called type-2 alkenes, which are widespread in both the environment and the brains of Alzheimer's patients, act as major drivers of the disease.
Our studies on the reactions of alkene derivatives with bromine and bromoform could form the basis for studies of similar processes in biological systems.
The solvent activities correlated with the alkene to alkane ratios, with more alkenes observed from the more active catalysts.
In the present work, we detail the modification of low molecular weight acrylics with species containing long chain alkenes and the use of the modified polymers in thermoset coatings.
The copolymer, representing 1-20% by weight, is selected from the group consisting of copolymers of propylene with 45-60% by weight of one or more CH2_CHR alkenes, where R is an alkyl group containing 2 to 6 carbon atoms or copolymers of propylene with 45-60% by weight of the one or more CH2_CHR alkenes and with 0-6% by weight ethylene; copolymers of 20 to 80% by weight ethylene with one or more CH2_CHR_ alkenes, where R_ is an alkyl group containing from 1 to 6 carbon atoms, the copolymers of ethylene containing from 0-30% of fraction insoluble in xylene at 25[degrees]C, or copolymers of 20-80% by weight ethylene with one or more of the CH2_CHR_ alkenes and from 1-10% by weight of a diene.
Propene, an alkene corresponding to propane, is [FORMULA DATA OMITTED]
After acetylene, it is the most simple alkene and unsaturated hydrocarbon.
This is a 1,1-disubstituted alkene monomer technology with applications in the automotive, building and construction, packaging, and electronics industries.