Infrared Spectrum of Matrix-Isolated (NO)2

Abstract

Matrix‐isolated (NO)₂ has been obtained by rapid deposition of NO–N₂ mixtures on an optical window at 15°K, by limited diffusion of matrix‐isolated NO at low temperatures, and by photochemical production of O atoms in an N₂O environment. Controlled low‐temperature studies allowing limited molecular diffusion indicate spectral growth patterns due to three different species. Experiments carried out with ¹⁵NO and N¹⁸O isotopic samples along with the photochemical production of (NO)₂ suggests that cis and trans O=N=N=O and possibly another unstable cis form are produced.