Stabilizing the Homopolycation (I ) with a Hexasulfate in (I )[S O ] and a Borosulfate in (I )[B(S O ) ].

The reaction of elemental iodine and SO in a sealed glass ampoule yielded a turquoise-colored solution. At temperatures below 7 °C, deep red crystals of (I )[S O ] grow. With the addition of B O and pyridine-SO complex red crystals of (I )[B(S O ) ] can be obtained after heating the mixture to 120 °C. The combination of an (I ) cation with oxoanions has previously not been observed. Both anions have a significant but different influence on the structural properties of the (I ) cation.