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Front Cover: Preparation and Characterization of Pure Thiosulfuric Acid (Z. Anorg. Allg. Chem. 12‐13/2018)
Author(s) -
Hopfinger Mathias,
Zischka Florian,
Seifert Mathias,
Kornath Andreas J.
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201870121
Subject(s) - tautomer , anhydrous , hydrogen bond , argumentation theory , cover (algebra) , chemistry , polymer chemistry , computational chemistry , organic chemistry , molecule , philosophy , engineering , epistemology , mechanical engineering
The cover picture shows the two tautomers of thiosulfuric acid. It is one of the prominent examples in basic courses in inorganic chemistry to demonstrate that the (OH)(OH) tautomer is unlikely because of the “double bond rule”. This has been for a long time the only one argumentation for the (OH)(SH) tautomer as the acid has never been observed directly by spectroscopical methods. The isolation of pure thiosulfuric acid succeeded for the first time by reaction of dry Na 2 S 2 O 3 with anhydrous hydrogen fluoride. Surprisingly, the acid is more stable than believed before, as long as it is kept dry and below –15°C. The spectroscopical evidence is described in the article by Kornath et al. on page 574 ff .