Knowledge Bank

The observation and a preliminary analysis of about twenty ro-vibrational transitions of the $\nu 3$ fundamental of the $CD3$ radical was reported at this meeting last $year1$. We present here analysis of sixty two infrared absorption lines in the $\nu 3$ fundamental band. The main molecular parameters determined in the present work are the band origin $\nu 0=2381.0886(40).B\prime =4.758737(40),C\prime =2.373297(34),(\zeta C),=0.476278(72),q,=0.00376(59)$, all in $cm1$ with one standard deviation in parenthesis. The derived molecular parameters were compared with those for the $CH3$ radical $\nu 3=I$ level determined $previously2$. A relatively weak set of transitions were also observed in the vicinity of the $\nu 3$ fundamental. These transitions were tentatively assigned to the $\nu 2+\nu 3\leftarrow \nu 2$ infrared transition. Results for both the $\nu 3$ and $\nu 2+\nu 3\leftarrow \nu 2$ bands will be discussed.