Knowledge Bank

The microwave spectra of trans-1, 2-difluorocyclopropane, 1, 2-dideutero-trans-1, 2-difluorocyclopropane and 3, $3\prime$-dideutero-trans-1, 2-difluorocyclopropane have been investigated in the region from 18 to 40 GHz. The respective rotational constants obtained are (in MHz): \begin{eqnarray*}A=11\ 546.50,\ B=3559.93,\ C=3071.37;\ A=10\ 438.53,\ B=3442.69,\ C=3056.94;\ A=9 838.18,\ B=3517.52,\ C=2944.82; \end{eqnarray*} Centrifugal distortion constants have also been determined.