Silver(I) cyanide
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| Silver(I) cyanide | |
|---|---|
| Image:Silver(I) cyanide.jpg | |
| General | |
| Systematic name | Silver cyanide |
| Other names | Argentous cyanide |
| Molecular formula | CNAg |
| SMILES | ? |
| Molar mass | 133.89 g/mol |
| Appearance | colorless, gray (impure) |
| CAS number | [506-64-9] |
| Properties | |
| Density and phase | 3.95 g/cm3 |
| Solubility in water | insoluble |
| Other solvents | insol. |
| Melting point | 320 °C |
| Structure | |
| Coordination geometry |
linear |
| Crystal structure | |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | toxic |
| NFPA 704 |    |
| R/S statement | R: 25-32-33-41-50/53 S: 7-26-45-60-61 |
| RTECS number | VW3850000 |
| Supplementary data page | |
| Structure and properties |
Specific Heat Capacity = 0.498185 J/g-°C Heat of Formation = 146 kJ/mol |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Related compounds | AgCl NaCN Copper(I) cyanide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Silver cyanide is chemical compound AgCN. This colorless solid forms upon treatement o is used in some schemes to recover silver from solution. It adopts an interesting structure, consisting of chains with the connectivity Ag-C≡N-Ag-C≡N-, etc. Two-coordination is typical of silver, and cyanide is well known to bridge transition metals, as illustrated by the more famous case of Prussian Blue.
AgCN precipitates upon the addition of sodium cyanide to a solution containing Ag+. The precipitate dissolves upon the addition of other ligands, such as cyanide or a tertiary phosphine.
Silver cyanides form structural complex materials upon reaction with other anions.[1] Some silver cyanides are luminescent.[2]
[edit] References
- ^ Urban, V.; Pretsch, T.; Hartl, H. “From AgCN Chains to a Fivefold Helix and a Fishnet-Shaped Framework Structure” Angewandte Chemie International Edition 2005, volume 44, pages 2794 – 2797.
- ^ Omary, M. A.; Webb, T.R.; Assefa, Z.; Shankle, G. E.; Patterson, H. H. “Crystal Structure, Electronic Structure, and Temperature-Dependent Raman Spectra of Tl[Ag(CN)2]: Evidence for Ligand-Unsupported Argentophilic Interactions” Inorganic Chemistry 1998, volume 37, pages 1380-1386.
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