nitryln.

1864 Chem. News 2 Apr. 162/2 Any nitro-compound heated to 100°C with hydriodic acid..will have its ‘nitryl’ converted into nitric oxide (NO), or into ‘nitrosyl’ or amide (NH₂).

1870 Proc. Royal Soc. 1869–70 18 349 The author found it extremely desirable..to trace the modifications undergone by nitryl as it is transmitted (from the chloride, hydrate, or free radical) through an adequate succession of combinations.

1872 H. Watts tr. L. Gmelin Handbk. Chem. Index 213/2 Nitryl (NO⁴), substitution of, for hydrogen.

1897 Proc. Royal Soc. 61 326 It appears that the presence in a molecule of certain radicles such as hydroxyl and nitryl always causes high values of the dielectric constant in the liquid state.

1932 Science 20 May 544 In 1862 Richard Müller gave an accurate description of the preparation, properties, analysis and determination of the vapor density of nitryl chloride, NO²Cl.

1962 P. J. Durrant & B. Durrant Introd. Adv. Inorg. Chem. xix. 674 The two compounds nitryl fluoride, FNO₂..and nitryl chloride, ClNO₂..are well-characterised.

1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) x. 332 The only known nitryl halides, which may be regarded as derivatives of HNO₃ where a halogen atom replaces OH, are FNO₂ and ClNO₂.