JAMB - Chemistry (2002 - No. 31)
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
CH3CH2CH2CH3
CH2 = CH - CH2CH3
HC≡CH
CH3 - C = C - CH3
Explicació
When ethyne is passed through an ammoniacal solution of copper(I) chloride, a red-brown precipitate of copper(I) acetylide is produced. Terminal alkynes also react to form a red-brown precipitate