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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.", where Ph stands for phenyl group. [1]
Kalamazoo/Battle Creek International Airport (IATA: AZO, ICAO: KAZO, FAA LID: AZO) is a county-owned public airport in Kalamazoo, Kalamazoo County, Michigan, US, 3 miles (4.8 km) southeast of Downtown Kalamazoo. [1] The airport is located approximately 20 miles (32 km) west of the city of Battle Creek.
Azo pigments are similar in chemical structure to azo dyes, but they lack solubilizing groups. [8] Many so-called azo pigments are not strictly classifiable as azo compounds since they exist as keto hydrazide tautomers, which lack the -N=N- linkage. C.I. Pigment Yellow 12, an azo pigment (also classified as a diarylide pigment).
Azo or AZO may refer to: Azo of Bologna, a medieval Italian jurist; Azo of Iberia, a Georgian ruler; Azo compound, a functional group and class of compounds; Azo dye, a class of colored compounds containing the azo group; Aluminium-doped zinc oxide, a transparent conducting film; see Indium tin oxide § Doped compounds
Azobenzene is a photoswitchable chemical compound composed of two phenyl rings linked by a N=N double bond.It is the simplest example of an aryl azo compound.The term 'azobenzene' or simply 'azo' is often used to refer to a wide class of similar compounds.
Allura Red AC, also known as FD&C Red 40 or E129, is a red azo dye commonly used in food. It was developed in 1971 by the Allied Chemical Corporation, who gave the substance its name. [1] [2] It is usually supplied as its red sodium salt but can also be used as the calcium and potassium salts. These salts are soluble in water.
In organic chemistry, an azo coupling is an reaction between a diazonium compound (R−N≡N +) and another aromatic compound that produces an azo compound (R−N=N−R’).In this electrophilic aromatic substitution reaction, the aryldiazonium cation is the electrophile, and the activated carbon (usually from an arene, which is called coupling agent), serves as a nucleophile.
Although the structure proposed by Ziegler was not confirmed, he was able to develop an alternative synthesis of tartrazine based on the idea that a hydrazone is the tautomeric form of an azo compound (azo-hydrazo tautomerism). This production process was patented in 1893 (British Patent 5693). [7] [8]
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