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.