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tetrathionate : ウィキペディア英語版 | tetrathionate
The tetrathionate anion, S4O62−, is a sulfur oxoanion derived from the compound tetrathionic acid, H2S4O6. Two of the sulfur atoms present in the ion are in oxidation state 0 and two are in oxidation state +5. Alternatively, the compound can be viewed as the adduct resulting from the binding of the Lewis base S22− to SO3. Tetrathionate is one of the polythionates, a family of anions with the formula ()2−. Its IUPAC name is ''(sulfonatodisulfanyl)sulfonate'', the name of its corresponding acid is ''(sulfodisulfanyl)sulfonic acid''. The Chemical Abstracts Service identifies tetrathionate by the CAS Number 15536-54-6. ==Formation== Tetrathionate is a product of the oxidation of thiosulfate, S2O32−, by iodine, I2: :2S2O32− + I2 → S4O62− + 2I−
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