Über das Auftreten Höherer Selenanmonosulfandisulfonate im Verlauf der Reduktion von Selenit mit SeS₃O ²⁻₆

Abstract

Selenite reacts with SeS₃O ²⁻₆ in acidic solutions forming selenanmonosulfandisulfonates with up to 6 Se-atoms in the chain. Se₅S₃O ²⁻₆ and Se₆S₃O ²⁻₆ have been detected for the first time. The decomposition causes precipitation of a sulfur/selenium-mixture. For the Se-precipitation giving reactions of SeO ²⁻₃ with sulfite, S₂O ²⁻₃ , SeSO ²⁻₃ , SeS₂O ²⁻₆ and SeS₃O ²⁻₆ a universal reaction scheme has been developed, prevailing of the following single steps: formation of monoselenandisulfonates, formation of build-up reagents, formation of higher selenopolythionates, decomposition of the selenopolythionates with the longest chains.