Activation parameters for the reaction of 2-V₆O₈²⁻ and [V₆O₇(OMe)₁₂]¹⁻ with H₂Phen.

Complex	K a (M−1 s−1)	ΔH‡ (kcal mol−1)	ΔS‡ (cal K−1 mol−1)	ΔG‡b (kcal mol−1)
2-V6O82−	0.28 ± 0.01	6.3 ± 0.4	−34.0 ± 1.5	16.4 ± 0.8
[V6O7(OMe)12]1−	0.033 ± 0.002	6.6 ± 0.8	−33.6 ± 3.3	16.6 ± 1.8

^aat −25 °C.

^bat 25 °C.