Addition Reaction

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Related to Addition Reaction: elimination reaction, Substitution reaction

addition reaction

[ə′di·shən rē′ak·shən]
(organic chemistry)
A type of reaction of unsaturated hydrocarbons with hydrogen, halogens, halogen acids, and other reagents, so that no change in valency is observed and the organic compound forms a more complex one.

Addition Reaction


one of the main types of chemical reaction in which a single new substance is formed from two or more individual substances, for example, NH3 + HCl = NH4Cl. Addition reactions include many reactions involving the recombination of atoms and radicals (H + H = H2 and CH3 + C2H5 = C3H8), reactions involving the addition of halogens to unsaturated aromatic compounds (C6H6 + 3C12 = C6H6C16), reduction reactions (C2H4 + H2 = C2H6), and reactions for the formation of complex compounds. Addition reactions are often intermediate steps in complex chemical processes.

References in periodicals archive ?
The population is defined by the collection of elastomer backbone sites or even the ones in other initially present species and in various reaction intermediates and products, available for hydrogen abstraction, addition reactions, radical coupling (crosslink formation), polymer scission, or radical transfer.
In the range of 20-30%, the addition reaction occurs on both sites and with preference to 1,2-vinylic double bonds.
After the MI assisted addition reaction for 3 min, the ESR spectrum of the reaction mixture solution showed a weak ESR signal, whose g value and line width ([DELTA][H.
the main reaction was the addition reaction of amine and oxirane groups (15) to afford secondary hydroxyl groups (see Fig.
Secondary hydroxyl--OH groups were generated during addition reaction.
The paths for addition reaction were examined by intrinsic reaction coordinate (IRC) calculation at the B3LYP/6-31G(d) levels.
The kinetic model simulation has to be able to either describe the complete cross-linking process phenomenologically (4) or mechanistically (5-7) including homolytic cleavage of the peroxide, beta cleavage of the oxy radical, hydrogen abstraction, addition reactions, radical coupling (cross-link formation), polymer scission, and radical transfer for a wide range of compositions and an assortment of elastomers, using a single set of rate constants.
5 M) for the reaction mixture, only the isomerized trans product was formed in trace amounts with no addition reaction taking place in all three methods.
Terminal, or pendant double bonds (vinyl), have low steric hindrance and are more likely to participate in addition reaction than internal double bonds (cis/trans).
5-7) Commercial ASPE-based diamines are derived from the Michael addition reaction between aliphatic diamines and diethyl maleate (DEM).
We successfully developed an effective addition reaction of phenylacetylene to aldehydes in aqueous solution via C H activation catalyzed by a bi-metallic Ru-In system.
This family of linear polymers is formed by the addition reaction of ethylene glycol.