Table I.
Physicochemical properties of selected monoterpenoids at 25°C
| Property | Linalool | 1,8-Cineole | Trans-β-Ocimene | d-Limonene |
|---|---|---|---|---|
| Diffusion coefficient in air (DA, m2 s−1) | 5.17 × 10−6 | 5.46 × 10−6 | 5.46 × 10−6 | 5.64 × 10−6 |
| Diffusion coefficient in water (DW, m2 s−1) | 6.26 × 10−10 | 6.64 × 10−10 | 6.52 × 10−10 | 6.82 × 10−10 |
| Saturated vapor pressure (PV, Pa) | 21.3 | 253 | 197 | 253 |
| Water solubility (δ, mol m−3) | 10.2 | 19.1 | 0.0797 | 0.0886 |
| Henry's law constant (H; Pa m3 mol−1) | 2.078 | 13.27 | 3330 | 2850 |
| Log[octanol-water partition coefficient (Ko/w, mol mol−1)] | 2.97 | 2.61 | 4.45 | 4.485 |
| Gas-phase internal conductance (Gias, m s−1) | 1.59 × 10−3 | 1.67 × 10−3 | 1.68 × 10−3 | 1.73 × 10−3 |
| Liquid-phase internal conductance (GL, m s−1) | 5.88 × 10−4 | 3.46 × 10−4 | 1.54 × 10−3 | 1.61 × 10−3 |
Supplemental data of derivation of and references to the physicochemical monoterpene characteristics and internal diffusion conductances are provided at www.plantphysiol.org. Averages were calculated whenever multiple estimates were available.