Kamlet-Taft solvent parameters

There are three Kamlet-Taft solvent parameters: α (hydrogen bond donor), β (hydrogen bond acceptor), and π* (polarizability).
The values of α have been set to 0 for solvents that are assumed to be unable to donate hydrogen bonds. This truncation at 0 is the main reason it differs from other measures of hydrogen bond acidity such as ET and AN.

Occasionally a "polarity correction term" (fudge factor), δ, is seen in correlations. For aromatics δ=1.0, for polychlorinated compounds δ=0.5, and for all other solvents δ=0.0 . If possible this type of ad hoc parameters should be avoided and separate correlations used for different solvent classes.

α is correlated with →Dimroth-Reichardt ET (→ET vs α) and →Gutmann AN (→AN vs α).
β is correlated with →Gutmann DN (→DN vs β) except for amines and sulfides.
π* is correlated with →Catal├ín SPP (→SPP vs π*).

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NameFormulaαβπ*🏷 Tag
diethyl carbonateC5H10O30.000.400.45ester
diethyl etherC4H10O0.000.470.27ether
diethyl sulfideC4H10S0.000.370.46
diisopropyl etherC6H14O0.000.490.27ether
diisopropyl sulfideC6H14S0.000.380.36
dimethyl carbonateC3H6O30.000.43ester
dimethyl phthalateC10H10O40.000.780.82aromatic ester
dimethyl sulfideC2H6S0.000.340.57
dimethyl sulfoxideC2H6OS0.000.761.00
diphenyl etherC12H10O0.000.130.66aromatic ether
dipropyl etherC6H14O0.000.460.27ether
ethoxybenzeneC8H10O0.000.300.69aromatic ether
ethyl acetateC4H8O20.000.450.55ester
ethyl benzoateC9H10O20.000.410.74aromatic ester
ethyl chloroacetateC4H7ClO20.000.350.70halo ester
ethyl formateC3H6O20.000.360.61ester
ethyl trichloroacetateC4H5Cl3O20.000.250.61halo ester
fluorobenzeneC6H5F0.000.070.62aromatic halo fluoro