diazonium salts


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di·a·zo·ni·um salts

salts of a theoretical base, R- N + ΞN or R-N=NOH, useful in histochemistry to demonstrate tissue phenols and aryl amines or with enzymatically released naphthols and naphthylamines to form the chromophore azo group -N=N-; diazonium salts contain only one R- N + ΞN group, tetrazonium salts contain two, and hexazonium salts contain three; examples include fast garnet GBC base and naphthol AS.
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The first step in the synthesis of azo dyes is the conversion of amine compounds into diazonium salts.
Here, chemists and related scientists begin to fill that gap by exploring such aspects as attaching organic layers to material surfaces by reducing diazonium salts, analytical methods for characterizing aryl layers, electrografting conductive oligomers and polymers, electronic properties of silicon surfaces modified by aryl diazonium compounds, and various electrochemical strategies for grafting electronic functional molecules to silicon.
It provides guidance on selecting the appropriate aminating agent--whether haloamines, hydroxylamines, diazonium salts, azo compounds, or azides--for different types of carbon nucleophile.
22) In order to achieve chemical bonding, chemically reactive forms of bonding components, such as alkylating agents, diazonium salts, anhydrides and acylatnig agents are used.
We studied the formation of a phenyl layer by electrochemical reduction of aryl diazonium salts (BF4-,+N2-ph- OCH3) on a p-Si-H (111) electrode in an aqueous medium (0.
Among the commonly used procedures [18], these include the formation of aryl radicals by reduction of diazonium salts.
The grafting of organic layer by electronic reduction of aryl diazonium salts was discovered in 1992 by Delmar, Hitmi, Pinson and SavACopyrightant [22].
Other topics include metal contacts to p- type diamond, structural analysis of detonation nanodiamonds, ternary boron and aluminum carbonitride thin films, aryl diazonium salts for functional diamond platforms, and carbon nanotube growth by DC plasma enhanced CVD.
To the best of our knowledge, the synthesis of 8-hydroxy-4-methyl- 2-phenylpyrido[2',3':4,5]thieno[2,3-d]pyrimidin-6- (5H)-one derivative in a simple single step from 5-cyano-1,6-dihydro-4-methyl-2-phenyl-6-thioxo- pyrimidine 1, which can be coupled with diazonium salts to afford the arylazo-pyrido[2,3:4,5]thieno- [2,3-d]pyrimidines dyes have not yet been reported.
Next, the appropriate arylamine 5a-e (p-methylaniline, p-anisidine, p-chloroaniline, p-nitroaniline and aniline) were diazotized with hydrochloric acid/sodium nitrite to afford the diazonium salts 5'a-e, respectively.
To this cooled solution, the prepared diazonium salt 5'a-e above was added slowly so that the temperature did not rise above 5 degC, while maintaining the pH at 8-9 by addition of solid sodium carbonate.