Knowledge Bank

The $\nu 2$ band of $\mathrm{<mrow\; data-mjx-texclass="ORD">14</mrow>}N16O2$ near $13.3\mu$ has been measured under high resolution using a liquid helium cooled Ge:Cu detector and a vacuum infrared spectrograph equipped with a 40 grooves/mm grating. Over 700 transitions were identified representing eighty-percent of the observed rotational structure. Analysis of the band, combined with previous work at shorter wavelengths, led to modified molecular constants. The new constants reproduced 272 non-zero-weighted transitions and 446 ground state combination differences with a standard deviation of about $0.010$ $cm-1$. The large spin-rotation line splittings which were observed were described satisfactorily using existing formulations.