double bond


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double bond
double bond between oxygen atoms

double bond

n.
A covalent bond in which two electron pairs are shared between two atoms.

double bond

n
(Chemistry) a type of chemical bond consisting of two covalent bonds linking two atoms in a molecule

dou′ble bond′


n.
a chemical linkage consisting of two covalent bonds between two atoms of a molecule, represented in chemical formulas by two lines, two dots, or four dots, as CH2=CH2; CH2:CH2; CH2::CH2.

dou·ble bond

(dŭb′əl)
A type of covalent bond in which two electron pairs are shared between two atoms. Each atom contributes two electrons to the bond. See more at covalent bond.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.double bond - a covalent bond in which two pairs of electrons are shared between two atoms
covalent bond - a chemical bond that involves sharing a pair of electrons between atoms in a molecule
References in periodicals archive ?
Cis configurations are those in which the molecule on both sides of the double bond bends in the same direction--both either up or down.
A rubber composition comprising: (A) a conjugated diene rubber which is obtained by polymerizing a conjugated diene compound or polymerizing a conjugated diene compound and an aromatic vinyl compound and has a group having an active hydrogen and a group capable of chemically binding to a silica, (B) a silica, (C) a silane coupling agent (1) capable of reacting with a carbon-carbon double bond of the conjugated diene in the conjugated diene rubber, and (D) a silane coupling agent (II) capable of reacting with the group having an active hydrogen; a method for producing a rubber composition, which comprises mixing the above-mentioned composition; and a tire which is obtained by crosslinking and molding the rubber composition obtained by the method for production.
Tenders are invited for Design - Separation Probe Double Bond Groups Ernei Structure and Paingeni
In the presence of unsaturated silane, the double bond on the silane can react with PP macroradical, which results in a stable grafted PP macroradical.
1] were used to quantify the silane incorporation and the terminal double bond formation, respectively [10,11].
in the sidewalls of tires which typically have a high double bond concentration due to the NR and BR in these compounds (figure 2).
Displacement of double bond between 4,5-position in 1,2-vinyl units with 3,4-position in the 1,4-trans units desheilded -CH- protons to 2.
Contract notice: replacement of a 225 000 v underground double bond in oleostatic cables by retrofitting.
1H-NMR spectrum showed the characteristic signal for olefinic proton of trisubstituted double bond at I' 5.
Another story looks at the potential replacement of one of butyl rubber's carbon-carbon double bonds with a phosphorus-carbon double bond, allowing for chemical transformation of this rubber polymer.
an acryloyl, the acceptor), acidic C-H bonds (as present in aceto-acetate and malonate moieties, the donor), and a base catalyst strong enough to abstract the proton of this C-H bond yielding a nucleophilic carbanion that can add to the double bond.
During isomerization oleic acid with one double bond forms one trans isomer, linoleic acid with two double bonds forms three trans isomers and linolenic acid with three double bonds forms 7 trans isomers.