covalent bond

(redirected from Covalent bonding)
Also found in: Dictionary, Thesaurus, Medical.

covalent bond

(kō'vā`lənt): 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
..... Click the link for more information.

Covalent Bond


a chemical bond between two atoms that is formed by a shared electron pair (one electron from each atom). Covalent bonds exist both in molecules (in all states of aggregation) and between the atoms that form crystal lattices. They may unite like atoms (in H2 and C12 molecules and diamond crystals) or unlike atoms (in water molecules and crystals of carborundum, SiC).

Almost all the main bonds in the molecules of organic compounds are covalent (C—C, C—H, C—N, and so on). Covalent bonds are very strong, which explains the low chemical activity of paraffin hydrocarbons. Many inorganic compounds whose crystals have an atomic lattice (that is, are formed by a covalent bond) are refractory and characterized by great hardness and wear resistance; among them are certain carbides, suicides, borides, and nitrides (particularly borazone, BN), which are widely used in modern technology.


covalent bond

[kō′vā·lənt ′bänd]
A bond in which each atom of a bound pair contributes one electron to form a pair of electrons. Also known as electron pair bond.
References in periodicals archive ?
In the case of covalent bonding, the procedure involved a chemical modification of an amino-acid residue by covalently binding the 'enzyme' to a 'water-insoluble material' and by fixing the enzyme to a matrix by covalent bonding (DALLA-VECCHIA et al.
Finally, the covalent bonding of the NAD+ cofactor and the lactate dehygroenase enzyme upon the synthesized nanocomposite led to the production of a fully integrated bio-sensor for lactate analysis.
Emilio Sanchez, spokesman for ForeignTRADEX serving New Mexico, Arizona, Texas and Colorado regions said the website can be used to find direct and indirect suppliers of most types of chemicals such as element of compound based chemicals, including metal, nonmetal, metallic, covalent bonding, molecular, ionic and element formulas as well as various chemical supplies at http://www.
Specific topics include the synthesis and characterization of new fluorinated polymides, imidization of polyester-amine salt precursors to polymides, liquid crystalline structures and crystallization morphology in aromatic bismides and their blends with semicrystalline polymide, Ceramide materials for advanced high-performance and high-temperature applications, polymide matrices for carbon-to-carbon composites with turbostatic structures, molecular assembly of polymides and oligoimides with direct covalent bonding, and electroless metallization of polymides.
To estimate the extent of covalent bonding between the polymer and inorganic particles, the nanocomposite samples were extracted with THF for 7 days using a Sohxlet extractor.
Atomic structure, valence electrons, and covalent bonding
We also found that covalent bonding of the treatment chemical to silica is preferred to just associative, i.
Covalent Bonding of Functional Coatings on Conductive Materials: the Electrochemical Approach (Michal Ccius and Christine Jrme)
The first volume focuses on fundamental aspects of chemical bonding, and presents such perspectives as the physical origin of covalent bonding, the natural bond orbital (NBO) view, the valence bond perspective, the conceptual density functional theory, and relativity and chemical bonding.
4 indicates that alternating copolymer poly(styrene-maleic anhydride) (SMA) is successfully grafted onto the surface of the silica nanoparticles through covalent bonding.
AVL-192 is a novel, orally-available compound that rapidly and completely silences the HCV protease through highly selective, irreversible covalent bonding to the target protein.