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 ?
Abstract Michael addition reactions were utilized to form A[B.
The results obtained by thia-michael addition reaction with saturated solution of NH4Cl in water is shown in scheme 1.
Based on the proposed mechanisms involved in the Michael addition reaction of the -C=C- group of BMI with the active hydrogen atom of the >[CH.
And beside the reaction is an addition reaction and so is expected to be less prone steric hindrance as could be the addition elimination reaction with the related sulfone reagent 11.
This is followed by the conjugate addition reaction of this nucleophile (BTA9) with the electrophilic BMI to form BTA-[BMI.
High vinyl poly(butadienes) simply increase the concentration of reactive pendant unsaturation, further promoting crosslinking predominantly via addition reactions through the pendant vinyl group.
The extent of both combination and addition reactions will depend on the peroxide level, whereas only the extent of the addition reaction is affected by the diene type and content.
These consist of two components that enter into an addition reaction with each other at room temperature in the presence of a platinum catalyst.
This may be also attributed to Michael addition reaction and homopolymerization of Mioxd, which are possible competing reactions.
Key statement: A rubber composition comprising (A) an organopolysiloxane end-capped with alkenyldialkylsiloxy, radicals and free of aliphatic unsaturation, (B) an organipolysiloxane containing three alkenyl radicals on molecular side chains, (C) an organohydrogenpolysiloxane, (D) fumed silica and (E) an addition reaction catalyst forms a seal member having improved strength and reduced compression set and useful for sealing a polymer electrolyte fuel-cell separator.
With the reactive bismaleimide groups (two terminal --C=C-- groups), BMI can polymerize with active hydrogen atom-containing species such as multi-amines via the Michael addition reaction mechanism [1-6].
These are produced by either addition reaction of primary radicals to double bonds in NBR or hydrogen abstraction from methylene carbon atoms by primary radicals in HNBR.