Characterization of the S2N2H– ion by 14N and 15N NMR spectroscopy

Abstract

¹⁴ N and ¹⁵N NMR spectroscopy shows that the deprotonation of S₇NH by potassium amide in liquid ammonia proceeds via the sequential formation of S₇N^–, S₄N^–, and S₃N^– to give S₂N₂H^–, which subsequently decomposes to S₃N₃^–; the S₂N₂H^– ion is also produced by treatment of S₄N₄H₄ with 2 mol equiv. of potassium amide in liquid ammonia.