Electrochemical and Spectroscopic Studies of Sulfur in Aluminum Chloride‐N‐(n‐Butyl)Pyridinium Chloride

The behavior of sulfur in aluminum chloride‐N‐(n‐butyl)pyridinium chloride was studied using Raman spectroscopy and electrochemical techniques. In basic (BPC‐rich) melts, sulfur can be reduced to sulfide, probably in the form of an species. No oxidation to positive oxidation states of sulfur is observed in basic melts. In acidic melts, sulfur can be oxidized to S(I) and eventually to S(IV), which is only stable in the melt for short periods of time. No reduction to sulfide‐like species or formation of low oxidation states is observed in acidic melts.