I am trying to find the theoretical diffusion constant of the Co(bpy)3 3+ (or Co(bpy)3 2+) complex in acetonitrile.

I also tried to calculate it by myself by using the Stokes-Einstein equation . Nevertheless, my approximation for the radius is not good enough and I don`have the elctrical mobility of Co(bpy)3 3+ .

If someone know where I can find these values, I will be very thankful.

Thanks in advance.