Nitrosodisulphonates. Part II. Crystal structure of the orange-brown triclinic modification of Fremy's salt (potassium nitrosodisulphonate)

Abstract

In attempts to prepare crystals of Fremy's salt K4[(SO3)2NO]2 suitable for X-ray structural analysis, it has been found that the salt exists in two distinct crystalline forms, monoclinic yellow-orange needles, and triclinic orange-brown rhombs respectively. We describe the results of an X-ray structural analysis of the triclinic form.