Knowledge Bank

In a continuing search for triplet $CF2$, two discharge techniques were used with $C2F6$ to produce excited $CF2$. The $CF2$ emission spectrum from a microwave discharge-flow system was identical to that from a high voltage discharge-flow system. These bands are compared to those observed in the laser induced fluorescence of $CF2$ which unambiguously extends the observation for the $A~1B1-X~1A1$ system to $4300\backslash AA1$. A reactive system has been reported which yields emission bands near 5600 {\AA} which were tentatively assigned to $a~3B1-X~1A1$ of $CF2\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}$. The production of $CF2(3B1)$ was accounted for the following reaction: \begin{equation} 0(^{3}P) + C_{2}F_{4} \rightarrow CF_{2}(^{3}B_{1}) + CF_{2}O. \end{equation} The 5600 {\AA} bands were reproduced by reacting $C2F4$ with the effluents of a discharge through $N2$ thus indicating they are due to $A~2\Pi -X~2\Sigma +$ of CN and not $CF2$.