Organic solvent-water partitioning

Note that if Kf has been determined from solubility measurements, ywsaU is strictly valid only for saturated conditions. For dilute solutions y,wsalt can be determined from measurements of air-water or organic solvent-water partition constants at different salt concentrations. From the few compounds for which ywsa,t has been determined by both solubility and air-water or solvent-water partitioning experiments, because of the large scatter in the data, it is not clear whether Kf varies with organic solute concentration. It can, however, be concluded that, if there is an effect, it is not very large. [Pg.160]

Finally, the relationships between the air-organic solvent, the air-water, and the organic solvent-water partition constants of a given compound (Eq. 6-11) will make it very easy to understand organic solvent-water partitioning, which we will treat in Chapter 7. [Pg.195]

Effect of Temperature and Salt on Organic Solvent-Water Partitioning... [Pg.213]

LFERs Relating Partition Constants in Different Solvent-Water Systems Model for Description of Organic Solvent-Water Partitioning Illustrative Example 7.1 Evaluating the Factors that Govern the Organic Solvent-Water Partitioning of a Compound... [Pg.213]

A more common way of expressing organic solvent-water partition constants is to use molar concentrations in both phases (Eq. 3-45) ... [Pg.215]

Table 7.1 Organic Solvent-Water Partition Constants of a Series of Compounds for Various Organic Solvents at 25°C ... [Pg.217]

Often we may want to quantitatively extrapolate our experience with one organic solvent-water partitioning system to know what to expect for new systems. This is typically done using a linear free energy relationship of the form ... [Pg.218]

Table 7.2 Organic Solvent-Water Partitioning Multiparameter LFERs Eq. 7-8 for Some Selected Organic Solvents at 25°C a... [Pg.221]

Which is(are) the dominating factor(s) determining the organic solvent-water partitioning of the majority of organic compounds of environmental concern ... [Pg.239]

Why is the effect of temperature on organic solvent-water partitioning of organic compounds in many cases not very significant What maximum A(VJHj values would you expect Give examples of solutes and organic solvents for which you would expect (a) a substantial positive (i.e., > 10 kJmol-1) and (b) a substantial negative (i.e., <-10 kJmol-1) A(viHj value. [Pg.239]

Illustrative Example 8.3 Assessing the Air-Water Distribution of Organic Acids and Bases in a Cloud Organic Solvent-Water Partitioning... [Pg.245]

In contrast to air-water partitioning, the situation may be a little more complicated when dealing with organic solvent-water partitioning of organic acids and bases. As an example, Fig. 8.9 shows the pH dependence of the n-octanol-water distribution ratios, D,ow (HA, A"), of four pesticides exhibiting an acid function ... [Pg.270]

Any attempt to estimate a Kioc value for a compound of interest (with its particular abilities to participate in different intermolecular interactions) should take into account the structural properties of the POM present in the system considered. To this end, the use of multiparameter LFERs such as the one that we have applied for description of organic solvent-water partitioning (Eq. 7-9) would be highly desirable (Poole and Poole, 1999). Unfortunately, the available data do not allow such analyses, largely due to the very diverse solid phase sources from which reported Kioc values have been derived. [Pg.300]

Chapter 7 7.1 Evaluating the Factors that Govern the Organic Solvent-Water Partitioning of a Compound... [Pg.1310]

Torrens, F. (2000) Universal organic solvent-water partition coefficient model. /. Chem. Inf. Comput. Sci, 40, 236-240. [Pg.1185]

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