covalent bond

(redirected from Unsaturated bond)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Unsaturated bond: Polar bond
click for a larger image
covalent bond
In a water molecule, each hydrogen atom (H) shares an electron (yellow) with the oxygen atom (O).

covalent bond

n.
A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms.
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.

covalent bond

n
(Chemistry) a type of chemical bond involving the sharing of electrons between atoms in a molecule, esp the sharing of a pair of electrons by two adjacent atoms
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

cova′lent bond′


n.
the bond formed by the sharing of a pair of electrons by two atoms.
[1960–65]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
click for a larger image
covalent bond
Covalent bonding as seen in a hydrogen chloride molecule. The hydrogen atom (H) shares an electron (yellow) with the chloride atom (Cl).

co·va·lent bond

(kō-vā′lənt)
A chemical bond formed when electrons are shared between two atoms. Usually each atom contributes one electron to form a pair of electrons that are shared by both atoms. See more at bond, coordinate bond, double bond, ionic bond.
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.covalent bond - a chemical bond that involves sharing a pair of electrons between atoms in a molecule
bond, chemical bond - an electrical force linking atoms
double bond - a covalent bond in which two pairs of electrons are shared between two atoms
coordinate bond, dative bond - a covalent bond in which both electrons are provided by one of the atoms
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
enlace covalente
kovalenttinen sidos
liaison covalente
kovalent bağ
References in periodicals archive ?
The modified conjugated diene-based polymer is produced by a production method that includes a main chain modification step that reacts at least either an unsaturated bond or a functional group that is included in a terminal-modified polymer and is not situated at a terminal of the terminal-modified polymer, with a specific compound that includes a functional group that interacts with silica, the terminal-modified polymer being obtained by introducing a functional group that interacts with silica into at least one terminal of the conjugated diene-based polymer.
These enzymes convert a saturated bond into an unsaturated bond between carbon molecules in fatty acids and they are further esterified to glycerolipids.
[PO.sub.o] showed the presence of unsaturated bond based on the proton, [sup.1]H-NMR (Figure 1), and carbon, [sup.13]C-NMR (Figure 2), spectra at 5.3 ppm and 130 ppm.
(4) Selected reviews for silicon unsaturated bond com pounds: (a) Okazaki, R.
The inner layer comprises a thermoplastic polyurethane resin material with at least one ethylenically unsaturated bond in its backbone, at least one pendent hydroxyl group, or a combination thereof, wherein an interfacial chemical bond is formed between at least one of an unreacted functional group of at least one light-stable aliphatic thermoplastic polyurethane and an unreacted functional group of at least one heat activated crosslinking monomer or agent of the outer layer and at least one of at least one ethylenically unsaturated bond and at least one pendent hydroxyl group of the inner layer.
The proton and hydride are then sequentially transferred to an unsaturated bond effecting hydrogenation or--more challenging, but thermochemically feasible--to an oxygen-carbon bond effecting hydrogenolysis.