Partition of compounds from water and from air into the wet and dry monohalobenzenes

Abstract

Listen

Translate article

Values of the partition coefficient from the gas phase (Ks) and from water (Ps) to the monohalobenzene solvents have been collected for fluorobenzene (21 solutes), chlorobenzene (212 solutes), bromobenzene (126 solutes) and iodobenzene (65 solutes). It is shown that for the wide range of solutes studied, partitions into the dry and wet (water-saturated) solvents are essentially the same, and that equations can be constructed that include data on both dry and wet solvents. Using the Abraham equations, that contain a maximum of five descriptors, statistically satisfactory equations are obtained for log Ks and log Ps with estimated predictive standard deviations of around 0.20 log units. The coefficients in the Abraham equations for the four halobenzene solvents are surprisingly similar and except for the s-coefficient, which reflects the solvent dipolarity/polarisability, are also similar to the coefficients for partition into toluene.