Kinetics of the electron-transfer reaction, iodine with ‘cobalt(II) sepulchrate’
Abstract
The reaction I2+ 2[Co(sep)]2+→ 21–+ 2[Co(sep)]3+ obeys the rate law –d(In[I2]T)/dt=k0[I2][Co(sep)2+]+kI[I3–][Co(sep)2+](sep = 1,3,6,8,10,13 16,19-octa-azabicyclo[6.6.6]icosane). At 25 °C in 0.1 mol dm–3 KCl, k0=(5.9 ± 0.8)× 104 dm3 mol–1 s–1 and kI=(3.93 ± 0.09)× 104 dm3 mol–1 s–1. These values are consistent with predictions from the Marcus cross-relation.
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