Only the third known example of a homoleptic polynitrogen species besides N2 and N3−, the N5+ ion possesses surprising stability and can be isolated on a macroscopic scale as its AsF6− salt. The assigment of the C2v‐symmetric structure (shown schematically) predicted by calculations was supported by IR and Raman as well as 14N and 15N NMR spectroscopic studies of the isotopically labeled product.

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