Przemysław Jan Malinowski, Mariana Derzsi, Armand Budzianowski, Piotr J. Leszczyński, Bartłomiej Gaweł, Zoran Mazej and Wojciech Grochala

Issue Chemistry – A European Journal Volume 17, , Issue 38, page 10481, Sep 12, 2011 
Chem. Eur. J., 17: 10481. doi: 10.1002/chem.201190185

Neither sulfate nor peroxodisulfate. Thermal decomposition of transition-metal sulfates, such as CuSO₄, usually occurs by desulfation (elimination of SO₃). In their Communication on page 10524 ff., W. Grochala et al. show that Ag^IISO₄ exhibits an unusual reductive pathway of thermal decomposition, which is connected with low-temperature elimination of O₂ and formation of the disulfate of Ag^I. Although the decomposition pathway renders Ag^I₂S₂O₇, similar to K₂S₂O₈ (with its peroxo OO bridge), the thermodynamics and kinetics of this reaction differ markedly for both compounds.

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