IR-SEC of [Re(tBu-bpy)(CO)3Cl] (black, 2) under N2 in 0.1 M Bu4NPF6/MeCN, showing three major species as the potential is increased cathodically: ReI(tBu-bpy˙−)(CO)3Cl (red), Re0(tBu-bpy)(CO)3 (green), Re0 (tBu-bpy˙−)(CO)3 (blue). IR-SEC cell: Pt working electrode, Pt counter electrode, Ag pseudo-reference electrode. (B) Cyclic voltammogram of 2 under N2 in 0.1 M Bu4NPF6/MeCN (GC WE, Pt wire CE, Ag/AgCl pseudo-RE, with Fc added as an internal standard), showing correlation to species seen in IR-SEC. Y-axis is current density (J) and the x-axis is potential (V) vs. saturated calomel electrode (SCE). Reproduced from ref. 29 with permission from American Chemical Society, Copyright 2014.