What is the kd of ethanoic acid between isobitanol and water?

Answer 1

Do you mean isobutanol? I found this but it isn't free. Perhaps the summary will give the value. I'll continue to look.
http://www.markedbyteachers.com/as-and-a-level/classics/determination-of-the-partition-coefficient-of-ethanoic-acid-between-water-and-butan-1-ol.html

Answer 2

I believe that article lists it as 0.8040 for the partition coefficient.