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N5+: A Novel Homoleptic Polynitrogen Ion as a High Energy Density Material
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2001
Year
Only the third known example of a homoleptic polynitrogen species besides N<sub>2</sub> and N<sub>3</sub> <sup>-</sup>, the N<sub>5</sub> <sup>+</sup> ion possesses surprising stability and can be isolated on a macroscopic scale as its AsF<sub>6</sub> <sup>-</sup> salt. The assigment of the C<sub>2v</sub>-symmetric structure (shown schematically) predicted by calculations was supported by IR and Raman as well as <sup>14</sup>N and <sup>15</sup>N NMR spectroscopic studies of the isotopically labeled product.