Chemistry:Baljet reaction
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Short description: Chemical reagent for testing cardenolides
The Baljet reaction is a qualitative and quantitative method of analysis published by Henri Baljet[1] in 1918.[2] This chemical reaction is used for the detection and colorimetric[3] determination of cardenolides. To the sample, an aqueous hydroxide solution and an ethanolic picric acid solution is combined and added, with a positive test turning orange or red.[4][5] The mechanism involves cardenolides 1 reacting in alkaline solution with picric acid 2 to form stabilized Meisenheimer complexes, as shown with the resonance form 3a to 3c:
See also
- Keller's reagent (organic)
- Dische test
References
- ↑ The Etymology of Chemical Names: Tradition and Convenience vs. Rationality in Chemical Nomenclature, Walter de Gruyter & Co KG, 2019, ISBN 978-3-11-061124-3, https://books.google.com/books?id=M6zWDwAAQBAJ&dq=Baljet-Reaction+1918+Henri&pg=PT442
- ↑ Entry on Baljet-Reaktion. at: Römpp Online. Georg Thieme Verlag, retrieved 2024-11-18.
- ↑ Bell, Frederick K.; Krantz, John C. (1949-02-01). "Digitalis. VIII. The Baljet Reaction, Digitoxm and Digitoxigenin". Journal of the American Pharmaceutical Association (Scientific Ed.) 38 (2): 107–109. doi:10.1002/jps.3030380214. ISSN 0095-9553. PMID 18111465. https://linkinghub.elsevier.com/retrieve/pii/S0095955315315237.
- ↑ Siegfried Ebel, Hermann J. Roth: Lexikon der Pharmazie 1987, Georg Thieme Verlag Stuttgart, New York, ISBN 3-13-672201-9, S. 80.
- ↑ "GYLCOSIDES Presented by BAHADUR SINGH HOD - ppt download". https://slideplayer.com/slide/4509440/.
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