Nitryl is the nitrogen dioxide (NO2) moiety when it occurs in a larger compound as a univalent fragment. Examples include nitryl fluoride (NO2F) and nitryl chloride (NO2Cl).[1]

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. The nitrogen-centred radical is then free to form a bond with another univalent fragment (X) to produce an N-X bond, where X can be F, Cl, OH, etc.

In organic nomenclature, the nitryl moiety is known as the nitro group. For instance, nitryl benzene is normally called nitrobenzene (PhNO2).[2]

See also


  1. Nomenclature of Inorganic Chemistry IUPAC Recommendations 2005 (PDF). IUPAC. 2005.
  2. Chemistry., International Union of Pure and Applied Chemistry. Commission on the Nomenclature of Organic (1993). A guide to IUPAC nomenclature of organic compounds : recommendations 1993. Panico, Robert, 1925-, Powell, Warren H., 1934-, Richer, Jean-Claude. Oxford: Blackwell Scientific Publications. ISBN 0632037024. OCLC 27431284.

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