Table I.
Ratios of partitioning between water and apolar fractions, for selected small neutral molecules (1D = 3.336 ·10−30 Cm). For comparison, the dipole moment of water is 1.85 D.
| molecule | Dipole moment | Solubility In H2O at20 ° C | Partitioning factor Apolar/water | Apolar fraction | reference |
|---|---|---|---|---|---|
| NO• | 0.159 D | 2.1 mM | 9.7 | Bulk cyclohexane | (37) |
| NO• | 0.159 D | 2.1 mM | 9.2 | Bulk n-hexane | (37) |
| O2 | -- | 1.4 mM | 3 | DMPC bilayers | (38) |
| CO2 | -- | 39.2 mM | 1.7 | Bulk olive oil | (39) |
| CO2 | -- | 39.2 mM | 0.95 | Lecithin bilayers | (39) |
| CO2 | -- | 39.2 mM | 1.6 | Red cell membrane | (40) |
| H2O2 | 2.0 D | unlimited | 0.09 | octanol |