Diazo compds

N = N in diazo compds, hydrazoic acid, its salts and esters... 

Von Herz (Ref 1) prepd several diazo compds (such as Diazodinitropbenol, Diazo-dinitropkloToglucinol and Diazodinitroresor-cinol) which he claimed to be suitable for use in detonators percussion caps. 

Herz (Ref 2) claimed that perchlorates of many negatively substituted diazonium compds are powerful brisant expls suitable as primer compds In detonators. He suggested also that the perchloric acid diazo compds of mono- 8e polynitrated aromatic hydrocarbons can be used in primers detonators... 

Diazotization. This is a reaction by which a diazo compd is obtd from a primary amine. The reaction is as follows ... 

Diazotization is an important reaction because of the practical uses of diazo compds. One use of diazo compds is in the prepn of light-sensitive printing papers, since most diazo compds are stable in the dark but decomp in light. The largest most varied use of diazotization and diazo compds is for coupling with amino or hydroxy aromatic compds to produce azo dyes. The coupling occurs accdg to the equation ... 

For purposes of org nomenclature the terms azido" and "triazo are used syn-omously in the literature. The aryl azides are often called in German diazoimides. Aliphatic diazo compds contain the group = CN2, represented as a resonance hybrid of the structure... 

The dipole moments and structures of the org azides and aliphatic diazo compds were studied by Sidgwick et al (Ref 4). Sheinker Syrkin (Ref 13) made vibrational spectra measurements of org azides and deduced the configuration of azide compds. UV spectra confirmed the observations made on Raman and IR spectra. Heats of combustion and formation of org azides were detd by Murrin Carpenter (Ref 16). Patterson et al (Ref 7) discussed the CA method of naming and indexing org azides. For addnl info and discussion of org azides see the general references (Refs 1,2,3,5,8,10 A 12)... 

Azimidobenzene, CeH5 Nj. The p-amidobenzene is the parent compd of anhydro-p-amino-diazo-compds (Beil 26, 55)... 

Aromatic diazo compds and their technical application 1 A487... 

Diphenylamine, diazo compds and their nitrated derivs 5 D1427... 

The aromatic diazo compds contain the characteristic group(-N N-) which has replaced one H atom of a cyclic system. The group shows both mula [Ar.N ] +X are formed with acids and of the formula [Ar.Ng.O-] Na+with bases. The diazo compds are very reactive and are usually expl. They are formed when nitrous acid acts at low temp on salts of aromatic amines... 

Diazo compds were discovered by Griess in 1358. The procedure by which these compds are formed is called diazotization. The diazo compile arg not isolated from their solns as such but in the form of salts or bases, called diazonium compounds . Lower members of the aromatic diazo compds are very violent expls and for this reason only small nuants should be prepd at a time. As the amt of carbon in a compd is increased the expl props become weaker. For example, diazo compds of toluene, xylene, naphthal-, iolent ex ls and less sensitive... 

CH- CH=C.NH2 mw 163-13, N 25.76% brass-yel ndls or Ifts + 3.H2O loses w of crystn by heating on a water bath, mp explodes on heating mod sol in hot w si sol in hot ale insol m eth was prepd by treat ing 2,5-diaminobenzoic acid with nitrous acid. This compd does not exhibit the characteristics of an acid. It posseses basic properties and is a true diazo compd. Other props are given in the Refs Refs 1) Beil 16, 611-12 2) P. Griess, Ber... 

Without additional reagents Telluro- and seleno-acetals from diazo compds. and ditellurides or diselenides... 

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