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Polythionic acid : ウィキペディア英語版
Polythionic acid

Polythionic acid is an oxoacid which has a straight chain of sulfur atoms and has the chemical formula H2SnO6 (''n'' > 2). Trithionic acid (H2S3O6), tetrathionic acid (H2S4O6) are simple examples. The compounds of ''n'' < 80 are expected to exist, and those of ''n'' < 20 have already been synthesized. Dithionic acid (H2S2O6) does not belong to polythionic acid due to the difference in the property.
== Nomenclature ==
All polythionates anion contains chains of sulfur atoms attached to the terminal SO3H-groups. Names of polithionic acids are determined by the number of atoms in the chain of sulfur atoms:
* - dithionic acid
* - trithionic acid
* - tetrathionic acid
* - pentathionic acid, etc.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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