Erratum for the Report: “Synthesis and characterization of the pentazolate anion cyclo-N5ˉ in (N5)6(H3O)3(NH4)4Cl” by C. Zhang, C. Sun, B. Hu, C. Yu, M. Lu

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Science  21 Feb 2020:
Vol. 367, Issue 6480, eabb2965
DOI: 10.1126/science.abb2965

In the Report “Synthesis and characterization of the pentazolate anion cyclo-N5ˉ in (N5)6(H3O)3(NH4)4Cl” the authors inaccurately concluded that the synthesized 15N-labeled pentazolate salts exhibited an NMR resonance around –70.7 ppm. This resulted from a misinterpretation of test data, not from errors in data collection. In the original experiments, the authors did not consider that the 15N-labeled pentazolate salts in DMSO-d6 solution could decompose at ambient temperature during 12 hours of NMR measurement. The –70.7 ppm signal is due to dissolved N2 in Figs. 2B and 2C, which have now been deleted. In subsequent work [C. Yang et al., J. Am. Chem. Soc. 140, 16488 (2018)], the authors prepared a series of cyclo-N5ˉ salts, and their 15N NMR spectra exhibit a resonance in the –4.0 ppm to –6.0 ppm range.

In addition, the authors inaccurately concluded that after removal of Clˉ by precipitation with silver nitrate, the cyclo-N5ˉ decomposed quickly at ambient temperature. In fact, the cyclo-N5ˉ disappeared as a result of the formation of insoluble silver pentazolate, which is very similar to silver chloride [C. G. Sun et al., Nat. Commun. 9, 1269 (2018)].

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