Diazonium

  • (noun): The univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes.

Some articles on diazonium:

Gomberg–Bachmann Reaction
... Emmanuel Bachmann, is an aryl-aryl coupling reaction via a diazonium salt The arene compound 1 (here benzene) is coupled with base with the diazonium salt 2 to the biaryl 3 through an intermediate ... and benzene BrC6H4NH2 + C6H6 → BrC6H4−C6H5 The reaction offers a wide scope for both diazonium component and arene component but yields are generally low following ... One possibility is to employ diazonium tetrafluoroborates in arene solvent together with a phase-transfer catalyst, another is to use 1-aryl-3,3-dialkyltriazenes ...
Diazonium Compound - Reactions - Diazo Coupling
... An important reaction of aromatic diazonium salts is azo coupling ... In this process, the diazonium compound attacks electron-rich arenes such as anilines and phenols concomitant with release of a proton ... the dye called aniline yellow is produced by mixing aniline and cold solution of diazonium salt and then shaking it vigorously ...
Diazonium Compound - Preparation
... The process of forming diazonium compounds is called "diazotation", "diazoniation", or "diazotization" ... The most important method for the preparation of diazonium salts is treatment of aromatic amines such as aniline with nitrous acid ... In aqueous solution diazonium salts are unstable at temperatures above +5 °C the -N+≡N group tends to be lost as N2 (nitrogen gas) ...
Selective Chemistry Of Single-walled Nanotubes - Reaction Mechanism
... Diazonium reagent and SWNT reaction has a two step mechanism ... First, the diazonium reagent adsorbs noncovalently to an empty site on the nanotube surface, forming a charge-transfer complex ... This is a fast, selective noncovalent adsorption and diazonium group in this complex partially dopes the nanotube, diminishing the tangential mode in ...
Diazonium Compound - Safety
... Solid diazonium halides are often dangerously explosive, and fatalities and injuries have been reported ... Diazonium chlorides are processed without delay once prepared, but at the low temperature that the diazotization reaction is conducted at the product may be poorly soluble in ... Diazonium salts with weakly coordinating anions are quite stable ...