Potassium dicyanoargentate

Potassium dicyanoargentate is an inorganic compound with the formula KAg(CN)2. A white solid, it is the K+ salt of the linear coordination complex [Ag(CN)2]-. It forms upon treatment of virtually any silver salt with two equivalents of potassium cyanide.

Potassium dicyanoargentate
Names
IUPAC name
Potassium dicyanoargentate(I)
Other names
Potassium argentocyanide
Potassium silver cyanide
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.007.316
EC Number
  • 208-047-0
UNII
UN number 1588
  • InChI=1S/2CN.Ag.K/c2*1-2;;/q2*-1;2*+1
    Key: RQDBZJVQSLGBMI-UHFFFAOYSA-N
  • [C-]#N.[C-]#N.[K+].[Ag+]
Properties
KAg(CN)2
Molar mass 199.001 g/mol
Appearance White crystals
Density 2.36 g/cm3
Soluble
Solubility Insoluble in acids
1.625
Hazards
Safety data sheet (SDS) CAMEO Chemicals MSDS
Related compounds
Other anions
 Potassium dicyanoaurate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Uses and reactions

KAg(CN)2 is significant adventitious product of gold mining using cyanide as an extractant.[1]

It can be used in silver plating, as a bactericide, and in the manufacture of antiseptics.[2]

It forms a variety of coordination polymers, a property that exploits the bridging tendency of the cyanide ligand.[3]

References
  1. Liu, Wenqi; Jones, Leighton O.; Wu, Huang; Stern, Charlotte L.; Sponenburg, Rebecca A.; Schatz, George C.; Stoddart, J. Fraser (2021). "Supramolecular Gold Stripping from Activated Carbon Using α-Cyclodextrin". Journal of the American Chemical Society. 143 (4): 1984–1992. doi:10.1021/jacs.0c11769. PMID 33378203. S2CID 229930811.
  2. "Potassium Silver Cyanide". CAMEO Chemicals. NOAA.
  3. Shorrock, Carolyn J.; Xue, Bao-Yu; Kim, Peter B.; Batchelor, Raymond J.; Patrick, Brian O.; Leznoff, Daniel B. (2002). "Heterobimetallic Coordination Polymers Incorporating [M(CN)2]- (M = Cu, Ag) and [Ag2(CN)3]- Units: Increasing Structural Dimensionality via M−M' and M···NC Interactions". Inorganic Chemistry. 41 (25): 6743–6753. doi:10.1021/ic025850p. PMID 12470070.
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