Acetylide
chemical compound in which one or both hydrogen atoms of acetylene (ethyne) was replaced by a metal or other cationic group; also analogous compound derived from terminal acetylenes
Acetylide, also known as ethynide, dicarbide, and percarbide, is an ion. Its chemical formula is C22-. It is made by deprotonation of acetylene. Some acetylides (chemical compounds contain acetylide ions) are explosive. Many acetylides are used in organic chemistry. Some are known as carbides. Copper(I) acetylide is an example.