halogenation


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hal·o·gen·a·tion

(hal'ō-jĕ-nā'shŭn),
Incorporation of one or more halogen atoms into a molecule.

halogenation

the process of adding a molecule of a halogen to each double bond of an unsaturated fatty acid. Forms a basis for the measurement of a food's content of unsaturated fatty acids.
References in periodicals archive ?
However, functionalization of porphyrin derivatives had been limited to electrophilic substitution such as halogenation, nitration and formylation, which proceed selectively at the meso-positions in the case of meso-unsubstituted porphyrins such as 15 (Scheme 9).
Halogenation does not reduce Cryptosporidiurn below the microbiological hazard of 99.
Nitration, sulfonation, amination, halogenation, reduction, oxidation and diazotization are distinctive chemical process used in the preparation of these dyes.
Separate chapters are included on the applications of biocatalysis in material science, catalytic antibodies, and a full array of oxidations, including Baeyer-Villiger, aromatic, oxidation of C-N bonds, oxidation of sulfur and of amino groups, and halogenation.
Hydroxyl groups and benzene rings are useful functional groups located on the walls of wood cells, through which fire-retardant elements can be attached by reactions such as esterification, transesterification, etherification, and halogenation.
The halogenation reaction is carried out in a hydrocarbon solution such as hexane using elemental chloride and bromine (equimolar with the enchained isoprene).
Halogenation is a well-known approach to high RJ materials.
In this case the halogenation reaction is followed in the same manner as when treated with bromine water where an aqueous solution of phenol gives an immediate precipitate of 2,4,6-tribromophenol, owing to the powerfully activating influence of the negatively charged oxygen in the phenoxide ion [22] (figure 10).
Brown's research interests centre on electrophilic halogenation, mechanisms of the hydrolysis of amides and esters, effects of structural distortion on the reactivity of amides and the catalysis of alcoholysis of organophosphates by transition metals and lanthanides.
NBS and NCS, as important halogenation reagents, are used entirely as supplementary raw materials in the production of Active Pharmaceutical Ingredients (APIs) or pharmaceutical intermediate.
Moreover, halogenation of 2-aminothiazoles provide facile approach to the synthetically important 2-mono-and 2,5-dihalothiazole derivatives through modified Sandmeyer conditions [30].