Chloramine-T
Chloramine-T is the organic compound with the formula CH3C6H4SO2NClNa. Both the anhydrous salt and its trihydrate are known. Both are white powders. Chloramine-T is used as a reagent in organic synthesis.[2][3] It is commonly used as cyclizing agent in the synthesis of aziridine, oxadiazole, isoxazole and pyrazoles.[3] It's a inexpensive, low toxic and mild oxidizing agent, and it also acts as a source of nitrogen anions and eletrophilic cations. But it may undergo degradation on long term exposure to atmosphere, so care must be taken during the storage.
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Preferred IUPAC name
Sodium chloro(4-methylbenzene-1-sulfonyl)azanide | |
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ECHA InfoCard | 100.004.414 |
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Chemical formula |
C7H7ClNO2S·Na C7H7ClNO2S·Na·(3H2O) (hydrate) |
Molar mass | 227.64 g/mol 281.69 g/mol (trihydrate) |
Appearance | White powder |
Density | 1.4 g/cm3 |
Melting point | Releases chlorine at 130 °C (266 °F; 403 K) Solid melts at 167–169 °C |
Solubility in water |
>100 mg/mL (hydrate)[1] |
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D08AX04 (WHO) QP53AB04 (WHO) | |
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Corrosive |
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Hazard statements |
H302, H314, H334 |
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P260, P261, P264, P270, P280, P285, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P304+P341, P305+P351+P338, P310, P321, P330, P342+P311, P363, P405, P501 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Reactions
Chloramine-T contains active (electrophilic) chlorine. Its reactivity is similar to that of sodium hypochlorite. Aqueous solutions of chloramine-T are slightly basic (pH typically 8.5). The pKa of the closely related N-chlorophenylsulfonamide C6H5SO2NClH is 9.5.[2]
It is prepared by oxidation of toluenesulfonamide with sodium hypochlorite, with the latter being produced in situ from sodium hydroxide and chlorine (Cl2):[2]
Uses
Reagent in amidohydroxylation
The Sharpless oxyamination converts an alkene to a vicinal aminoalcohol. A common source of the amido component of this reaction is chloramine-T.[4] Vicinal aminoalcohols are important products in organic synthesis and recurring pharmacophores in drug discovery.
Oxidant
Chloramine-T is a strong oxidant. It oxidizes hydrogen sulfide to sulfur and mustard gas to yield a harmless crystalline sulfimide.[5]
It converts iodide to iodine monochloride (ICl). ICl rapidly undergoes electrophilic substitution predominantly with activated aromatic rings, such as those of the amino acid tyrosine. Thus, chloramine-T is used to incorporate iodine into peptides and proteins. Chloramine-T together with iodogen or lactoperoxidase is commonly used for labeling peptides and proteins with radioiodine isotopes.[6]
Certifications
- EN 1276 Bactericidal
- EN 13713 Bactericidal
- EN 14675 Virucidal
- EN 14476 Virucidal Norovirus
- EN 1650 Fungicidal
- EN 13704 Sporicidal Clostridium difficile
References
- "Chloramine-T hydrate". Sigma-Aldrich.
- Campbell, Malcolm M.; Johnson, Graham. (1978). "Chloramine T and Related N-halogeno-N-metallo reagents". Chemical Reviews. 78: 65–79. doi:10.1021/cr60311a005.
- Nayak, Yogeesha N.; Gaonkar, Santosh L.; Saleh, Ebraheem Abdu Musad; Dawsari, Abdullah Mohammed A. L.; Harshitha; Husain, Kakul; Hassan, Ismail (2022-03-01). "Chloramine-T (N-chloro-p-toluenesulfonamide sodium salt), a versatile reagent in organic synthesis and analytical chemistry: An up to date review". Journal of Saudi Chemical Society. 26 (2): 101416. doi:10.1016/j.jscs.2021.101416. ISSN 1319-6103.
- Bodkin, J. A.; McLeod, M. D. (2002). "The Sharpless asymmetric aminohydroxylation". J. Chem. Soc., Perkin Trans. 1. 2002 (24): 2733–2746. doi:10.1039/b111276g.
- Ura, Yasukazu; Sakata, Gozyo (2007). "Chloroamines". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a06_553.
- Rösch, F. Radiochemistry and Radiopharmaceutical Chemistry in Life Sciences. Vol. 4. Dordrecht, Boston, London: Kluwer Academic Publishers.
External links
- M. Shetty, T. B. Gowda (2004). "A Study of Substituent Effect on the Oxidative Strengths of N-Chloroarenesulphonamides: Kinetics of Oxidation of Leucine and Isoleucine in Aqueous Acid Medium". Zeitschrift für Naturforschung. 59: 63–72. doi:10.1515/znb-2004-0110. S2CID 46154131.
- Chemicalland21.com: Chloramine T (Tosylchloramide sodium)
- InChem.org: Chloramine T
- "Disifin USA". Archived from the original on 2009-12-25. Retrieved 2010-02-09.