Nitryl is the nitrogen dioxide (NO) moiety when it occurs in a larger compound.

A successful route would more likely proceed by trimerisation of nitryl cyanide, but this precursor also has not yet been synthesised.

Addition of one electron forms the neutral nitryl radical, NO; in fact, this is fairly stable and known as the compound nitrogen dioxide.

For example, the reaction of the hexafluoroplatinate salt with nitryl fluoride yields the nitronium salt:

Ethyl nitrate has been prepared by bubbling gaseous nitryl fluoride through ethanol at 10 C. The reaction was subsequently studied in detail.

Solid nitryl perchlorate can be made from NO, ClO, and O gases:

Henri Moissan and Lebeau recorded the preparation of nitryl fluoride in 1905 by the fluorination of nitrogen dioxide.

Examples include nitryl fluoride (NOF) and nitryl chloride (NOCl).

Recently another pathway, via NO, to ozone has been found that predominantly occurs in coastal areas via formation of nitryl chloride when NO comes into contact with salt mist.

The dissociation energy of 46.0 kcal of the N-F bond in nitryl fluoride is about 18 kcal less than the normal N-F single bond energy.

It is also prepared by reacting nitryl fluoride with tellurium or from the elements at 0 C or by reacting selenium tetrafluoride with tellurium dioxide at 80 C.

Nitryl fluoride, NO2F, is a colourless gas and strong oxidizing agent, which is used as a fluorinating agent and has been proposed as an oxidiser in rocket propellants (though never flown).

Nitronium perchlorate, NOClO, also known as nitryl perchlorate and nitroxyl perchlorate, is an inorganic chemical, the salt of the perchlorate anion and the nitronium cation.

Like nitrogen dioxide, the nitryl moiety contains a nitrogen atom with two bonds to the two oxygen atoms, and a third bond shared equally between the nitrogen and the two oxygen atoms.