The structure and rotationally resolved autodetachment spectrum of H15NO– and H14NO– near 3000 cm−1

Abstract

The rotationally resolved vibrational autodetachment spectrum of the H15NO– anion has been observed in the region from 2932 to 3092 cm-1. rRKN branches were observed for K=4 through 8, and two rQKN branches with K=5 and 6 were assigned. The rQ5N branch of H14NO– has also been identified. The new observations have allowed a rotational analysis of H15NO– and have required a re-analysis of the previously observed spectrum of H14NO–. The spectra are consistent with a ground state (rm1) geometry of rNH=1.099Å, rNO=1.330Å, and ∠HNO=105.5°, in good agreement with the results of Ellis and Ellison for the NO bond length and comparing well with recent theoretical treatments of this anion. The band has been reassigned as the 0,2,0-(0,0,0) band.