Qualitative understanding of partition preferences
Introduction
Cavity modelRules for partitioningThe cavity model in quantitative termsSelftest
Problems
1) Give a qualitative explanation 2) Estimate the extraction efficiency Answer 3) Assign partition constants to substances Answer 4) Fuel accident Answer 5) Mixture of similar isomeres ... ? Answer 6) Extraction with pentane or diethyl ether? 7) Prediction of partition constants Answer 8) Assign data to substances Answer 
9) Explain saturated vapor pressure 10) Apolar surface
Intermolecular interactions in every day life
FAQ3) Assign partition constants to substances
This table provides logarithmic partition constants log K iem> air/octanol
with K i air/octanol = C i air /C i octanol ) of the substances i = 2-Hexanone, n-Hexane, 1-Heptanol, 1-Hexanol, between air and the solvent octanol.
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Assign the partition constants to the substances and explain shortly what made you choose this particular substance.
Answer: Hexane should have the least tendency to partition from air to octanol because it is the smallest of all compounds (see Rule 8) and does not form H-bonds with octanol ( log Kiao = -2.1); heptanol should have the largest tendency to partition from air to octanol because it is the largest of all compounds (see Rule 8) and it does form H-bonds with octanol as a H-bond acceptor and H-bond donor ( log Kiao = -5.8). Assignment of the remaining compounds should be self evident.
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