Knowledge Bank

The rotational spectrum of $CD3CN$ has been measured up to 1500 GHz for the ground state and up to 400 GHz for several excited vibrational states: $vg=1,2,3,v4=1,v7=1,v3=1$ and $v6=1$. Many of these states are located between 700 and $1100cm-1$ and some of them are involved in the submillimeter emissions of $CD3CN$. The different types of interactions between these levels are discussed. A comparison is made with CH3CN, which shows a similar diagram of energy levels.