New Raman spectra of Na2S dissolved in hyper-concentrated NaOH(aq) and CsOH(aq) cast serious doubt on the widely-assumed existence of S2−(aq). To avoid conceptual and practical problems with sulfide equilibria in numerous applications, S2−(aq) should be expunged from the chemical literature. Thermodynamic databases involving sulfide minerals also need careful revision.
P. M. May, D. Batka, G. Hefter, E. Königsberger and D. Rowland, Chem. Commun., 2018, 54, 1980 DOI: 10.1039/C8CC00187A
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