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金属
Wikipedia definition
1. AcetylideAcetylide, ethynide, dicarbide, or percarbide is the divalent anion with formula C2 or (C≡C). It may be regarded as the result of removing two protons from acetylene C2H2 or H-C≡C-H, the prototypical alkyne — that behaves as a weak acid. These terms are also used for any monovalent anion of the form R-C≡C, where R is any monovalent organic moiety; such as hydrogenacetylide H-C≡C, or methylacetylide H3C-C≡C.
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