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Lecture 4
Inner Sphere Electron Transfer
The reduction of hexaamminecobalt(3+) by hexaaquochromium(2+) occurs slowly (k = 10
-3
M
-1
sec
-1
) by an outer sphere mechanism.
However, if one ammonia ligand on Co(III) is substituted by Cl
-
, reaction now occurs with a substantially greater rate (k = 6 x 10
5
M
-1
sec
-1
).
