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Qu'est-ce (qui) est azo group - définition
CLASS OF ORGANIC COMPOUNDS BEARING THE FUNCTIONAL GROUP R–N=N–R′, IN WHICH R AND R′ CAN BE EITHER ARYL OR ALKYL
Azo Compound; Azo compounds; Azo-dye; Azo group; Azo radical; Developed dye; Azo-; Azene
Azo compound
Azo compounds are compounds bearing the functional group diazenyl (, in which R and R′ can be either aryl or alkyl).
Azo-
·- A combining form of Azote.
II. Azo- ·- Applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, ·etc.
III. Azo- ·- Now especially applied to compounds containing a two atom nitrogen group uniting two hydrocarbon radicals, as in azobenzene, azobenzoic, ·etc. These compounds furnish many artificial dyes. ·see Diazo-.
azo-
['e?z??]
¦ prefix Chemistry containing two adjacent nitrogen atoms between carbon atoms.
Origin
from obs. azote 'nitrogen', from Fr., from Gk a- 'without' + zoe 'life'.
Wikipédia
Azo compound
Azo compounds are organic compounds bearing the functional group diazenyl (R−N=N−R′, in which R and R′ can be either aryl or alkyl groups).
IUPAC defines azo compounds as: "Derivatives of diazene (diimide), HN=NH, wherein both hydrogens are substituted by hydrocarbyl groups, e.g. PhN=NPh azobenzene or diphenyldiazene." The more stable derivatives contain two aryl groups. The N=N group is called an azo group (from French azote 'nitrogen', from Ancient Greek ἀ- (a-) 'not', and ζωή (zōē) 'life').
Many textile and leather articles are dyed with azo dyes and pigments.
