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Updated: May 23, 2026

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand
Published on: September 8, 2016
The elusive tetrasulfate anion [S4O13](2-)
Christian Logemann1, Thorsten Klüner, Mathias S Wickleder
1Carl von Ossietzky University of Oldenburg, Institute for Pure and Applied Chemistry, Germany.
Abstract:
Sulfates united: the unique tetrasulfate S(4)O(13)(2-) anion was observed in the structure of (NO(2))(2)[S(4)O(13)] that forms in the reaction of N(2)O(5) with SO(3). Theoretical investigations show that the anion is a stable member of the polysulfate series [S(n)O(3n+1)](2-), which was investigated up to n=11.
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