The disparity in near-threshold cross-section between the "A" and "B" features is a tell-tale sign of HT coupling in cryo-SEVI spectra, as this indicates that "B" features correspond to detachment with lower values of l than the "A" features, reflecting the electronic character of the u ∏ electronic state that lends intensity to these transitions. Consequently, spectra for the "B" peaks can be obtained closer to photodetachment threshold, where cryo-SEVI resolution is improved, leading to narrower features as was observed in the cryo-SEVI spectra of the indenyl and anions. As such, we are able to refine our determined value for the v2 bending mode of NiO2 from the position of B1 as 120(7) cm -1 .