14N and 15N NMR characterization and the identification in sulphur–ammonia solution of the S7N– ion
Abstract
The cyclic sulphur imide, S7NH, and the thermally unstable S7N–-ion have been characterized by 14N and 15N NMR spectroscopy; the existence of S7N–, in addition to S4N– and small amounts of S3N–, in sulphur–ammonia solutions is demonstrated by 14N NMR spectroscopy.