Knowledge Bank

The FCO radical was detected in the gas phase by the diode laser spectrometer. Bands corresponding to the C-O stretching $(\nu 1,5.4\mu m)$ and the C-F stretching $(\nu 2,10\mu m)$ were observed. To confirm that the observed spectra are due to FCO, we also observed $F13CO$ spectrum in the $\nu 1$ band. The FCO radical was generated by an A.C. discharge in the mixtures of\ (1) $C2F4$, (100mTorr) $+O2$ (100mTorr) $+$ He\ (2) $SF6$ (B0mTorr) $+$ CO (150mTorr) $+$ He\ (3) $C2F4$ (B0mTorr) $+$ CO (150mTorr) $+$ He\ each gave the same signal to noise ratio, when the reactants were flown through the multiple reflection cell at the total pressure of 1 Torr. We determined the rotational constants, the centrifugal distortion constants and the spin-rotation interaction constants in each vibrational states, both of $F12CO$ and $F13CO$.