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.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

Mentioned in

References in periodicals archive

Initially, to evaluate the catalytic activity of Feist's acid for the Michel addition reaction, indole 4 and [beta]-nitrostyrene 2a have been chosen as model substrates.

Facile and promising method for Michael addition of indole and pyrrole to electron-deficient trans-[beta]-nitroolefins catalyzed by a hydrogen bond donor catalyst feist's acid and preliminary study of antimicrobial activity

Although chiral ethers-crown are more resistant to decomposition and have been used successfully, for example, in asymmetric Michael addition reactions, their high cost makes impracticable their use in industrial scale [8].

Efficient asymmetric synthesis of S'S-2-methylsulfanyl-2-methylsulfinyl-1-indanone

Alkenes in general are also known to undergo addition reactions at lower temperatures.

Bromination of dimethyl maleate using bromoform as catalyst under different energy sources: a case study for its role in biotransformations

After the Michael addition reaction was complete as demonstrated by NMR, polyesterification was performed by increasing the reaction temperature to 120[degrees]C, adding 0.3 wt% titanium butoxide catalyst and applying reduced pressure (ca.

Hydrogen bonding effects on aspartate ester reactions

Table-2: Addition reaction of 2-Mercapto-5-Methyl- [1, 3, 4] thiadiazde with oleic acid in the presence of catalyst

Synthesis of Novel 2-Substituted Thiadiazole Derivatives

Recently, we have developed a mechanistic model that adequately predicted the Michael addition polymerization of BMI with BTA in the temperature range 383-423 K with the aid of adding sufficient HQ to completely suppress the free radical polymerization (5), This approach is capable of decoupling the rather complicated competitive Michael addition reaction and free radical polymerization mechanisms, thereby leading to the true key kinetic parameters such as the reaction rate constants and activation energy for the Michael addition reaction polymerization.

Effect of solvent proton affinity on the kinetics of Michael addition polymerization of N,N'-bismaleimide-4,4'-diphenylmethane with barbituric acid

In the case of less bulky and especially bisphosphine chelating ligands, different types of 14-electron Pd[L.sub.2] complexes have been postulated as active catalysts, and corresponding products of the oxidative addition reactions to such complexes have been characterised [37-40].

A Quantum-Chemical DFT Approach to Elucidation of the Chirality Transfer Mechanism of the Enantioselective Suzuki-Miyaura Cross-Coupling Reaction

The three new adhesive types are two-component, colorless and transparent silicone gels that crosslink via a platinum-catalyzed addition reaction to form soft, highly flexible materials with an elastic, gel-like consistency.

Silicone gels for adhesion in wound dressing

It is miscible in xylene with the PDMS containing vinyl group of 10 mol% and the HSO to prepare easily the CHM by silicon-hydrogen addition reaction at room temperature by means of casting solution method.

Oxygen-enriching properties of a new hybrid membrane cross-linked from PDMS and fluorine-containing silicone resin

Caption: FIGURE 1: Free energy profile for the [3 + 2] and [2 + 2] addition reaction between CpCo[(NO).sub.2] and ethylene.

[3 + 2] versus [2 + 2] Addition: A Density Functional Theory Study on the Mechanistic Aspects of Transition Metal-Assisted Formation of 1, 2-Dinitrosoalkanes

Ammonium chloride which is inexpensive and readily available reagent catalyzes the thia-michael addition reaction of thiols in water efficiently.

Nontoxic, Inexpensive, Ammonium Chloride-Mediated (In Water) Synthesis of Some Novel 1,5-benzothiazepine Derivatives and Their Antimicrobial Activity

With the reactive bismaleimide groups (two terminal -C=C-groups), BMI can polymerize with active hydrogen atom-containing species such as polyamines via the Michael addition reaction mechanism (1-6).

Kinetics of Michael addition polymerizations of N,N'-bismaleimide-4,4'-diphenylmethane with barbituric acid