Correction to: Nature https://doi.org/10.1038/nature23662, published online 28 August 2017.

In this Letter, under Methods section ‘[Na(H2O)(N5)]2H2O (2)’, the description “the intermediate product arylpentazole (5.000 g, 26.18 mmol)” should have read “the intermediate product sodium salt of arylpentazole (5.000 g, 21.64 mmol)”. In the legend of Fig. 3, we add that “All temperature points in the stability study were onset temperatures.” to avoid misunderstanding. These corrections have been made online.