Knowledge Bank

The microwave spectra of the normal isotopic species of $CF2=NCl1,2$ and $CF2=NH3,4$ have been reported. The $\mathrm{<mrow\; data-mjx-texclass="ORD">15</mrow>}N$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}C$ modifications of these molecules have been synthesized recently and their microwave spectra are currently being investigated. Preliminary results include rotational constant for $CF2=15NH$ [11453.8734(14). 10406.8540(13) and 5524.4432(12) MHz] and for $CF2=15N35Cl$ [11091.6714(26), 2541.6901(6) and 2066.2876(5) MHz] and the quadrupole coupling constants $\backslash chaa,\backslash chbb-\backslash chcc$ and $\backslash chab$ for $CF215N35Cl$. The consequences of the new for the structure of these interesting small molecules will be discussed.