aniline dye - significado y definición. Qué es aniline dye
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Qué (quién) es aniline dye - definición

CHEMICAL COMPOUND
Aminobenzene; Aniline dye; Phenylamine; Aniline dyes; Aniline compounds; Industrial production of aniline; Industrial production of Aniline; Anilinium chloride; Aniline hydrochloride; Anilinium; Amino benzene; Benzamine; C6H5NH2; Coal dye; Coal tar dye; Benzenamine; C.I. 76001; UN 1548; Aniline chloride; Aniline salt; Benzenamine hydrochloride; Phenylamine hydrochloride; Phenylammonium chloride; C6H8ClN; Phenyl amine; Anilene; Benzidam
  • 2,6-diisopropylaniline]], a colorless liquid when pure, illustrating the tendency of anilines to air-oxidize to dark-colored products.
  • The lone electron pair on the nitrogen delocalizes into the pi system of the benzene ring. This is responsible for nitrogen’s weaker basicity compared to other amines.
  • [[Ball-and-stick model]] of aniline from the [[crystal structure]] at 252 K
  • 400px
  • Aniline can react with bromine even in room temperatures in water. Acetyl chloride is added to prevent tribromination.
  • Cake of [[indigo dye]], which is prepared from aniline.
  • [[Polyaniline]]s can form upon oxidation of aniline.
  • Most aniline is consumed in the production of [[methylenedianiline]], a precursor to polyurethanes.

aniline         
['an?li:n, -l?n]
¦ noun Chemistry a toxic oily liquid used in the manufacture of dyes, drugs, and plastics.
Origin
C19: from anil 'indigo' (from which it was orig. obtained), via Fr. and Port. from Arab. an-nil.
Aniline         
·adj Made from, or of the nature of, aniline.
II. Aniline ·noun An organic base belonging to the phenylamines. It may be regarded as ammonia in which one hydrogen atom has been replaced by the radical phenyl. It is a colorless, oily liquid, originally obtained from indigo by distillation, but now largely manufactured from coal tar or nitrobenzene as a base from which many brilliant dyes are made.
Phenylamine         
·noun Any one of certain class of organic bases regarded as formed from ammonia by the substitution of phenyl for hydrogen.

Wikipedia

Aniline

Aniline (from Portuguese anil 'indigo shrub', and -ine indicating a derived substance) is an organic compound with the formula C6H5NH2. Consisting of a phenyl group (−C6H5) attached to an amino group (−NH2), aniline is the simplest aromatic amine. It is an industrially significant commodity chemical, as well as a versatile starting material for fine chemical synthesis. Its main use is in the manufacture of precursors to polyurethane, dyes, and other industrial chemicals. Like most volatile amines, it has the odor of rotten fish. It ignites readily, burning with a smoky flame characteristic of aromatic compounds. It is toxic to humans.

Relative to benzene, it is electron-rich. It thus participates more rapidly in electrophilic aromatic substitution reactions. Likewise, it is also prone to oxidation: while freshly purified aniline is an almost colorless oil, exposure to air results in gradual darkening to yellow or red, due to the formation of strongly colored, oxidized impurities. Aniline can be diazotized to give a diazonium salt, which can then undergo various nucleophilic substitution reactions.

Like other amines, aniline is both a base (pKaH = 4.6) and a nucleophile, although less so than structurally similar aliphatic amines.

Because an early source of the benzene from which they are derived was coal tar, aniline dyes are also called coal tar dyes.