Table 1.

Reduction potentials, apparent rate constants, and diffusion constants for cobaloxime complexes

Complex	E°′(Co(III/II))	E°′(Co(II/I))	kapp (M-1 s-1)	D (cm2/s)
Co(dmgBF2)2(CH3CN)2*	∼0.2†	−0.55	7,000	8.0 × 10-6‡
Co(dpgBF2)2(CH3CN)2*	∼0.3†	−0.28	200	1.4 × 10-6‡
2	∼0.2†	−0.37	1,100 ± 70	2.0 × 10-6§
3	∼0.2†	−0.37	900 ± 80	8.0 × 10-6§

^*Reference (17).

^†Irreversible couple.

^‡Diffusion constant determined by simulation of cyclic voltammogram in absence of acid (17).

^§Diffusion constant determined from scan rate dependence of the Co(II/I) peak current in the absence of acid.