Chemistry:Silver dichromate
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| IUPAC name
Silver dichromate
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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. https://www.sciencedirect.com/science/article/pii/S0025540813001104.
- ↑ 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.
- ↑ 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. https://www.sciencedirect.com/science/article/pii/0020708X81900697.
- ↑ Mai, Hoang Hoa; Duong, Nguyen Dinh (1995-08-01) (in English). Silver dichromate - a suitable dosimeter for radiation processing. https://www.osti.gov/etdeweb/biblio/77530.
General references
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
Template:Chromates and dichromates
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