I n h a l t s i i b e r s i c h t . Beim Ansauern von Na,AsS,-Losungen entsOehen reaktionsfahige GAsSH-Gruppen, die zuuachst unter intermolekularem Abspalten von H,S zu sehr unbestandigen (AsS,):--Ionen kondensieren. Aus dieser intensiv gelben Zwischenverbindung bildet sich bei weiterer Saurezugabe das polymere As(V)-Sulfid. A b s t r a c t . On acidifying of n'a,AsS, solutions reactive =AsSH groups are formed which condense under intermolecular elimination of H,S to form very instable (ASS,):ions. These intermediary, yellow species give rise to the formation of polymeric AsV sulphide on further acidification.
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