The absorption spectrum of NF 2

In the course of flash-photolysis kinetic-spectroscopy experiments on NF containing compounds, it was found necessary to examine the absorption of the NF ₂ radical at 2600Å reproted by Johnson and Colburn. Johnson and Colburn, using a Beckman Model DK-1 recording spectrophotometer, were able to demonstrate that NF ₂ is responsible for this absorption but limited their description of the spectrum to the statement that it was a "poorly structured band" with a "maximum at 260 mμ with a 20-mμ half-width". Their primary use of this absorption has been to demonstrate the existence of the equilibrium N ₂F ₄ ⇄ 2 NF₂ and to measure the equilibrium constant as a function of temperature. This communication reports a study of this absorption at a higher dispersion than that used by these authors.