Silver acetylide

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Structural formula
Structure of silver acetylide
General
Surname Silver acetylide
other names

Explosive silver

Molecular formula Ag 2 C 2
Brief description

photosensitive solid

External identifiers / databases
CAS number 7659-31-6
Wikidata Q418799
properties
Molar mass 239.76 g mol −1
Physical state

firmly

Melting point

Decomposition from 120 ° C

safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver acetylide is an initial explosive with the empirical formula Ag 2 C 2 and a detonation speed of about 4000 m · s −1 .

Properties and dangers

Silver acetylide forms white, explosive crystals and belongs to the group of carbides . Since the carbide ion [C≡C] 2− can be formally derived from ethyne ( acetylene ), it belongs to a subgroup of carbides, namely to the acetylides . The connection is under a load of 0.1 N friction sensitive .

use

Due to the sensitivity and degradability during storage, there is no technical application.

Manufacturing on a laboratory scale

Precipitated silver acetylide

The low solubility of silver acetylide in water is used for production on a laboratory scale : When gaseous ethyne is introduced into an aqueous solution of a readily soluble silver salt, silver acetylide precipitates as a colorless to gray precipitate. This can be filtered off and carefully dried . Extreme caution must be exercised here, as silver acetylide tends to decompose uncontrollably ( explosion ). The production works better if ethyne is introduced into an ammoniacal silver salt solution, since ammonia binds the protons of the ethyne. Silver acetylide then precipitates in large quantities.

literature

  • Paul Hölemann, Rolf Hasselmann: The accumulation of phosphorus and sulfur impurities in acetylene bottles . West German Publisher, 1959.
  • Paul Hölemann, Rolf Hasselmann: The dependence of the volume of saturated acetylene-acetone solutions on temperature and concentration . West German Publisher, 1959.
  • Paul Hölemann, Rolf Hasselmann: Determination of the vapor pressure and the heat of vaporization of liquid acetylene . West German Publisher, 1959.
  • Paul Hölemann, Rolf Hasselmann: The pressure dependence of the ignition limits of acetylene-oxygen mixtures . West German Publisher, 1961.
  • Alfred Stettbacher: The guns and explosives . Leipzig 1933.

Individual evidence

  1. ↑ Entry on organic silver compounds. In: Römpp Online . Georg Thieme Verlag, accessed on June 1, 2014.
  2. ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 .
  3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  4. ↑ Köhler, J .; Meyer, R .; Homburg, A .: Explosivstoffe , tenth, completely revised edition. Wiley-VCH, Weinheim 2008, ISBN 978-3-527-32009-7 .
  5. ↑ powerlabs.org

Web links

Commons : Silver Acetylide  - Collection of pictures, videos and audio files