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Issue 10, 1980
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Solutions of HBr in sulpholane


Solutions of HBr in C4H8SO2(2,3,4,5-tetrahydrothiophen 1,1-dioxide; sulpholane) are brown in colour, due to the presence of Br2. Infrared and u.v.investigations have established that equilibrium is set up in the system with C4H8SO2+ 2HBr [graphic omitted] C4H8SO + Br2+ H2O K= 2.4 × 10–5 at 20 °C (ΔH=–55 kJ mol–1 and ΔS=–275 J K–1 mol–1). Proton n.m.r. observations of HBr–C4H8SO2 solutions show that protonation of the solvent occurs. The addition of H2O to such solutions leads to unusual n.m.r. spectra that indicate only slow exchange of H between C4H8SO2H+ and H2O.

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Article type: Paper
DOI: 10.1039/DT9800002028
Citation: J. Chem. Soc., Dalton Trans., 1980,0, 2028-2031
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    Solutions of HBr in sulpholane

    J. Emsley, V. Gold and M. J. B. Jais, J. Chem. Soc., Dalton Trans., 1980, 0, 2028
    DOI: 10.1039/DT9800002028

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