To confirm the formation of Ni(I), a second experiment was performed in which a Ni-OMebpy solution (1:2 Ni:OMebpy) was reduced electrochemically while monitoring its UV-vis spectrum. The resulting difference spectrum (Fig. ) shows a broad feature with a maximum spanning from ~380-460 nm as the only feature of significance, which is distinct from the spectrum obtained for a related Ni(I) complex produced via cathodic reduction of NiBr2(dtbpy) where dtbpy = 4-4'-di-tertbutyl-2-2'-bipyridine (features at λ = ~430 and ~600 nm). This variation is consistent with the fact that the Ni species present in greatest concentration would be distinct in the two cases due to differences in the conditions (mono vs. bis bipyridine complexes, and tert-butyl vs. methoxy substitution on the bipyridine).