Silver acetylide

Silver acetylide
Wireframe model of silver acetylide
Names
Preferred IUPAC name
Silver acetylide
Systematic IUPAC name
Silver(I) ethynediide
Other names
  • Silver percarbide
  • Silver carbide
  • Silver dicarbide
  • Argentous acetylide
  • Argentous ethynediide
  • Argentous percarbide
  • Argentous carbide
  • Argentous dicarbide
Identifiers
3D model (JSmol)
  • InChI=1S/C2.2Ag/c1-2;;/q-2;2*+1
    Key: FIDGMLJJLFFOEI-UHFFFAOYSA-N
  • [Ag+].[Ag+].[C-]#[C-]
Properties
Ag2C2
Molar mass 239.758 g·mol−1
Appearance gray or white solid
Density 4.47 g/cm3[1]
Melting point 120 °C (248 °F; 393 K)
Boiling point decomposes
insoluble
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 highly sensitive primary explosive
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 4: Readily capable of detonation or explosive decomposition at normal temperatures and pressures. E.g. nitroglycerinSpecial hazards (white): no code
3
3
4
Flash point 77 °C (171 °F; 350 K)
Thermochemistry
357.6±5.0 kJ/mol[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Silver acetylide is an inorganic chemical compound with the formula Ag2C2, a metal acetylide. The compound can be regarded as a silver salt of the weak acid, acetylene. The salt's anion consists of two carbon atoms linked by a triple bond, thus, its structure is [Ag+]2[−C≡C−]. The alternate name "silver carbide" is rarely used, although the analogous calcium compound CaC2 is called calcium carbide. Silver acetylide is a primary explosive.

  1. ^ McCowan, J. D. (1963). "Decomposition of silver acetylide". Transactions of the Faraday Society. 59: 1860–1864. doi:10.1039/tf9635901860.
  2. ^ Finch, Arthur; Gardner, Peter J.; Head, Arthur J.; Majdi, Hassan S. (1991). "The standard enthalpy of formation of silver acetylide". Thermochimica Acta. 180: 325–330. doi:10.1016/0040-6031(91)80402-5.