An abnormally strong self-association of 3,4-disubstituted 5-hydroxyfuran-2(5H)-ones in solution has been observed. All measurements reveal that in these compounds dimeric association is dominant. The association constants have been determined over the temperature range 23–55 °C, from which the enthalpies, –ΔH0, and entropies, –ΔS0, have been calculated.
S. Kovac, E. Solcaniova, E. Beska and P. Rapos, J. Chem. Soc., Perkin Trans. 2, 1973, 105 DOI: 10.1039/P29730000105
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