Is hydrazoic acid (HN3) an intermediate in the destruction of hydrazine by excess nitrous acid?

Kinetics of oxidation of nitrogen compounds by cerium(IV)

“…2 where the column headed R represents the ratio of Ce IV consumed to the value expected on the basis of eqns. ( 3) and ( 5), as shown in (9). In some of these experiments the final value of very small, e.g.…”

“…conjugate acid thereof), followed by a rapid tautomerisation to form an intermediate NH 2 N᎐ ᎐ NOH that can be detected spectrophotometrically. 9 To investigate whether this intermediate would react with Ce IV one reservoir of the stopped-flow apparatus contained NaNO 2 ϩ N 2 H 4 while the other contained Ce IV in sulfuric acid. Monitoring the nitrite ion peak at 355 nm for the reservoir solution showed no change in absorbance over a period of hours confirming the stability in the absence of acid.…”

Hydrazoic Acid and Azides

“…Originally hydrazoic acid was synthesized by reacting excess hydrazine monohydrate with nitrous acid using an additional acid source (e.g., nitric acid or perchloric acid) reaching at least a concentration of 1 mol/L [34]:…”

Chapter 26. Inorganic mechanisms

“…In an excess of HNO, a second diffusion-controlled nitrosation occurs which is believed to bypass this pathway. 220 In acid at room temperature, peroxynitric acid has a half-life221 for decomposition of ca. 30 min.…”