Lithium azide

Aluminium triazide Barium diazide Boron triazide Cadmium diazide Calcium diazide Chromyl azide Copper(l) azide Copper(ll) azide Lead(ll) azide Lead(IV) azide Lithium azide Lithium boroazide Mercury(l) azide Mercury(ll) azide Potassium azide Silicon tetraazide Silver azide... 

The use of azide reagents is also important for the synthesis of cyclic sulfur(VI)-nitrogen systems. The reaction of SOCI2 with sodium azide in acetonitrile at -35°C provides a convenient preparation of the trimeric sulfanuric chloride [NS(0)C1]3 (Eq. 2.16). " Thionyl azide, SO(N3)2 is generated by the heterogeneous reaction of thionyl chloride vapour with silver azide (Eq. 2.17). This thermally unstable gas was characterized in situ by photoelectron spectroscopy. The phenyl derivative of the six-membered ring [NS(0)Ph]3 can be prepared from lithium azide and PhS(0)Cl. ... 

Upon mixing solutions of benzenediazonium chloride and lithium azide, phenylpentazole (12) and covalent benzenediazoazide (13) are instantly formed from the ions [Eq. (3)]. The resulting intermediates... 

As with other metals, cupric and cuprous halides can detonate in contact with potassium. In addition, the action of cuprous chloride on lithium azide gives rise to a very violent reaction. 

There are also useful procedures for preparation of azides directly from alcohols. Reaction of alcohols with 2-fluoro-l-methylpyridinium iodide followed by reaction with lithium azide gives good yields of alkyl azides.75... 

See en[Pg.448]

Related ring-openings of levoglucosan-derived epoxides with 4 equivalents of lithium azide in the presence of alumina were reported by Cleophax and coworkers in 2004 (Scheme 6.132b) [267]. 

Suggestive evidence for the protonation of diphenylcarbene was uncovered in 1963.10 Photolysis of diphenyldiazomethane in a methanolic solution of lithium azide produced benzhydryl methyl ether and benzhydryl azide in virtually the same ratio as that obtained by solvolysis of benzhydryl chloride. These results pointed to the diphenylcarbenium ion as an intermediate in the reaction of diphenylcarbene with methanol (Scheme 3). However, many researchers preferred to explain the O-H insertion reactions of diarylcarbenes in terms of electrophilic attack at oxygen (ylide mechanism),11 until the intervention of car-bocations was demonstrated by time-resolved spectroscopy (see Section III).12... 

Lead(IV) acetate azide, 2402 Lead (II) azide, 4782 Lead(IV) azide, 4790 Lithium azide, 4685... 

Attempts to convert 1-bromo-l-phenylacetonitrile into the dicyano derivative under liquidrliquid two-phase conditions have been unsuccessful but, on addition of aqueous sodium hydroxide, l,2-dicyano-l,2-diphenylethene is formed by an oxidative dimerization mechanism [18], Similarly, diethyl bromomalonate fails to produce the corresponding azide with lithium azide under catalytic conditions the sole product (15%) is the ethene-l,l,2,2-tetracarboxylate [19]. 

Der genauc Mechanismus dieser Reaktion ist nicht bekannt. Die Azide werden durch Reaktion der ent-sprechenden Jodide mil iiberschiissigem Lithium-azid in Dimethyl-formamid (4 mljg Lithiumazid 75° 16 h) hergestellt. 

Hexazidocuprate-Lithium Salt. L [Cu(N3)6] mw 343.49, N 73.42% crysts with 3H20 which is lost above 120°. The anhydrous compound explodes at 224-5°. Prepd by dissolving Cupric Azide in aq or ale soln of Lithium Azide Refs 1) Gmelin, Syst No 60, Teil B, 150 (1958)... 

Lithium Azide was prepd by T. Curtius J. Rissom (Vol 1 of Encycl, p A588)... 

The best known nitrogen homocyles are the pentazoles RN5. Phenylpentazole PhN5 is obtained as a thermally unstable compound by the reaction of benze-nediazonium chloride with lithium azide in methanol at —40°C [eqn (11.1)]. ... 

Curtius and Rissom [41] prepared cupric azide by the action of an aqueous solution of sodium azide on an aqueous solution of cupric sulphate, obtaining the salt in a hydrated form. The anhydrous salt was prepared by Straumanis and Ciru-lis [125] in the form of dark brown, reddish sediment by reaction of lithium azide on cupric nitrate in an alcohol solution. Another method described by Curtius consists of reacting hydrazoic acid with metallic copper in an aqueous medium. 

The analogous sulfur-containing ring system, 1,3,4,5-thiatriazine, is also prepared by a ring expansion reaction (80JOC2604). Reaction of diphenylthiirene dioxide (255) with lithium azide in acetonitrile gives, among other products, the thiatriazine (14). The proposed... 

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