Acetylide (systematically named ethynediide, and dicarbide(2−)) is an inorganic anion with the chemical formula {Chem|C|2|2−}. It contributes no colour to acetylide salts. It is classified as a strong base. Such anions result from the removal of one or two protons from acetylene C2H2. Acetylide also refers to the anion of the formula RC≡C−...
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(from the article `acetylene`) The hydrogen atoms in acetylene can be replaced by metallic elements to form acetylides—e.g., acetylides of silver, copper, or sodium. The acetylides ...
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