Infrared Studies of the Photolysis of HN3 in Inert and Reactive Matrices. The Infrared Spectrum of NH

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Abstract
Infrared and ultraviolet observations have been made on the products of the photolysis of HN3 and DN3 suspended in Ar, N2, and CO matrices at 4°, 14°, and 20°K. Appreciable concentrations of NH (ND) in the ground (3Σ—) state are produced. The vibrational fundamental of NH has been observed directly at 3133±2 cm—1 in Ar and N2 matrices. The observation that H atoms are produced when HN3 is photolyzed in a CO matrix suggests that some of the HN3 molecules undergo photolytic rupture at the H–N bond. Consideration is given to the secondary reactions which occur between NH and itself or HN3. It appears likely that HN=NH and/or HN=N–N=NH may contribute to the observed products of these secondary reactions.

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