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Acet acetylide is a chemical compound. It is a salt of the acetylide anion, which has the formula C2^2-. Acetylides are formed when a metal reacts with acetylene or a terminal alkyne. In the case of acet acetylide, the metal is not specified by this name alone, as it is a class of compounds rather than a single specific substance. However, it typically refers to a metal acetylide where the metal is in the +1 oxidation state, such as copper(I) acetylide, silver acetylide, or mercury(I) acetylide. These compounds are often formed through reactions involving acetylene gas.

Metal acetylides, particularly those of heavy metals like copper and silver, can be highly unstable and explosive, especially when dry. This sensitivity is due to the presence of the C≡C triple bond and the nature of the metal-carbon bond. For instance, copper(I) acetylide is a shock-sensitive explosive that can form when acetylene gas comes into contact with copper or copper alloys under certain conditions, such as in the presence of moisture. Similarly, silver acetylide is also known for its explosive properties.

The formation and handling of metal acetylides require extreme caution due to their potential for detonation. They are not commonly encountered in everyday life but can be relevant in specific industrial or laboratory settings where acetylene is used. The study of acetylides is important in understanding the chemistry of alkynes and the properties of metal-organic compounds.