2 = 0.62 V, Ep.-Ep. = 110 mV, l,,/l,, =1.59; [NI,(SnC,H,),,I. E,,, = 0.63 V, E,,-E,,, = 230 mV, I,,/I,, = 1.25. Cyclic voltammetry (CH,CN, Pt electrode vs. SCE, 0.05 M [Bu,N][CIO,]):[Ni,(SC,H,),IZ-, E,,,,,, = -0.37 V; [Ni,(SC,H,S),]2-, E "",,,, = -0.24 V.