Metal acetylides cupric acetylide

Metallic Derivatives, (a) Cuprous Acetylide. CujCg. Prepare an ammoniacal solution of cuprous chloride by first adding dilute ammonia to 2-3 ml. of dilute copper sulphate solution until the initial precipitate just redissolves and a clear deep-blue solution is obtained now add an aqueous solution of hydroxylamine hydrochloride drop by drop with shaking until the solution becomes first green and then completely colourless, the cupric salt being thus reduced to the cuprous derivative. 

Brameld et al(Ref 4) investigated the formation of copper acetylides from aq solus of various cupric salts and acetylene. The resulting compds appear to fall into two types a)black amors ppts and b)lustrous, metallic appearing plates... 

The type b) cupric acetylides expl on gentle tapping (sometimes even when touched under soln) with a bright flash and report Co form metallic Cu. This type includes acetylides from Cu borate in strongly alkaline soln and from Cu acetate in acidic and strongly ammoniacal solns Refs l)Beil 1,241 [217] 2)H.G.Soder-... 

Cupric acetylide is used as a detonator. Its applications are very limited, however, because of its high sensitivity to impact or friction. It is susceptible to form and build up upon prolong contact of copper metal with organic vapors. 

Cupric acetylide is a gray-black colored substance. Depending on the method of preparation it may be produced as an amorphous substance, or as the so-called metallic, an extremely sensitive form. Cupric acetylide explosively decomposes if... 

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