On the Absorption Spectrum of CF2 and Its Vibrational Analysis

The flash photolysis of CF2Br2 has been used to obtain the absorption spectrum of the CF2 radical. The principal features of the spectrum are a progression of the upper state bending frequency, and a number of weak bands which are shown to arise from a vibrationally excited lower state. There is no evidence for transitions involving stretching vibrations. The vibrationless origin of the system (v1′=0, v2′=0, v1″=0, v2″=0) is shown to lie at approximately 37 695 cm—1. The deformation frequencies of the lower and upper states are about 660 and 500 cm—1, respectively.