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Silver dichromate
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| IUPAC name
Silver dichromate | |||
| Identifiers | |||
3D model (JSmol) |
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| ChemSpider | |||
| ECHA InfoCard | 100.029.131 | ||
| EC Number |
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PubChem CID |
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| UNII | |||
CompTox Dashboard (EPA) |
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| Properties | |||
| Ag2Cr2O7 | |||
| Molar mass | 431.76 g/mol | ||
| Appearance | ruby red powder | ||
| Density | 4.77 g/cm3 | ||
| Ksp = 2.0×10−7 | |||
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 dichromate is a chemical compound with the formula Ag2Cr2O7. It is insoluble in water and decomposes when treated with hot water. Its anion has a charge of -2.
Synthesis
Silver dichromate can be precipitated by reacting potassium dichromate with silver nitrate:
- K2Cr2O7 + 2 AgNO3 → Ag2Cr2O7 + 2 KNO3
Nanostructures can be produced via a sonochemical method using silver salicylate and ammonium dichromate as precursors.[1]
Applications
Related complexes are used as oxidants in organic chemistry.[2] For instance, tetrakis(pyridine)silver dichromate, [Ag2(py)4]2+[Cr2O7]2−, is used to convert benzylic and allylic alcohols to corresponding carbonyl compounds.[3]
Dichromate solutions containing silver ions have been investigated for use in dosimetry.[4][5]
References
- ↑ Soofivand, Faezeh; Mohandes, Fatemeh; Salavati-Niasari, Masoud (2013-06-01). "Silver chromate and silver dichromate nanostructures: Sonochemical synthesis, characterization, and photocatalytic properties". Materials Research Bulletin. 48 (6): 2084–2094. doi:10.1016/j.materresbull.2013.02.025. ISSN 0025-5408.
- ↑ 2</sub>Ag]<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>"},"year":{"wt":"1989"},"last1":{"wt":"Firouzabadi"},"first1":{"wt":"H."},"last2":{"wt":"Seddighi"},"first2":{"wt":"M."},"last3":{"wt":"Ahmadi"},"first3":{"wt":"Z. Arab"},"last4":{"wt":"Sardarian"},"first4":{"wt":"A. R."},"journal":{"wt":"Synthetic Communications"},"volume":{"wt":"19"},"issue":{"wt":"19"},"pages":{"wt":"3385"}},"i":0}}]}' id="mwXA"/>Firouzabadi, H.; Seddighi, M.; Ahmadi, Z. Arab; Sardarian, A. R. (1989). "Selective Oxidative Cleavage of Benzylic Carbon-Nitrogen Double Bonds Under Non-Aqueous Condition with Tetrakis(pyridine)-Silver Dichromate [(Py)2Ag]2Cr2O7". Synthetic Communications. 19 (19): 3385. doi:10.1080/00397918908052745.
- ↑ 4</sub>Ag<sub>2</sub>Cr<sub>2</sub>0<sub>7</sub> - A Mild and Efficient Reagent for the Conversion of Benzylic and Allylic Alcohols to Their Corresponding Carbonyl Compounds"},"year":{"wt":"1984"},"last1":{"wt":"Firouzabadi"},"first1":{"wt":"H."},"last2":{"wt":"Sardarian"},"first2":{"wt":"A."},"last3":{"wt":"Gharibi"},"first3":{"wt":"H."},"journal":{"wt":"Synthetic Communications"},"volume":{"wt":"14"},"pages":{"wt":"89–94"}},"i":0}}]}' id="mwaQ"/>Firouzabadi, H.; Sardarian, A.; Gharibi, H. (1984). "Tetrakis (Pyridine)silver Dichromate Py4Ag2Cr207 - A Mild and Efficient Reagent for the Conversion of Benzylic and Allylic Alcohols to Their Corresponding Carbonyl Compounds". Synthetic Communications. 14: 89–94. doi:10.1080/00397918408060869.
- ↑ Matthews, Ralph W. (1981-12-01). "Effect of Silver ions in dichromate dosimetry". The International Journal of Applied Radiation and Isotopes. 32 (12): 861–867. doi:10.1016/0020-708X(81)90069-7. ISSN 0020-708X.
- ↑ Mai, Hoang Hoa; Duong, Nguyen Dinh (1995-08-01). "Silver dichromate - a suitable dosimeter for radiation processing".
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General references
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.[page needed]
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