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
In chemistry, an acetylide is a compound that can be viewed as the result of replacing one or both hydrogen atoms of acetylene (ethyne) HC≡CH by metallic or other cations. Calcium carbide is an important industrial compound, which has long been used to produce acetylene for welding and illumination. It is also a major precursor to vinyl chloride. Other acetylides are reagents in organic synthesis.
Nomenclature
The term acetylide is used loosely. It applies to an acetylene RC≡CM, where R = H or a side chain that is usually organic. The nomenclature can be ambiguous with regards to the distinction between compounds of the types MC2R and M2C2. When both hydrogens of acetylene are replaced by metals, the compound can also be called carbide, e.g., calcium carbide Ca2+[−C≡C−], which is calcium acetylide. When only one hydrogen atom is replaced, the anion may be called hydrogen acetylide or the prefix mono- may be attached to the metal, as in monosodium acetylide or sodium hydrogen acetylide, Na+[−C≡CH]. Metal acetylide may be described as salts, but that description rarely comports with crystallographic analysis.
“Acetylide” enters the record as 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. Crown Archives preserves that source wording while asking what Acetylide, chemical and compound can confirm, complicate or overturn.
Why this record matters
“Acetylide” is worth following because a concise public description often conceals a longer documentary argument. Here, Acetylide, chemical and compound provides the most credible route into that argument.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Aug 6, 2026. The linked authority identifier is Q415602. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Acetylide”, its source revision and the description used here.
- Expand the search: follow Acetylide primary sources, Acetylide archive and Acetylide research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Acetylide”?
- Which observation, specimen, dataset or publication supports the account?
- Has classification or technical consensus changed since the cited source?
Search terms from this dossier
This entry incorporates text from “Acetylide” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.