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
benzonitrileC7H5N0.000.370.90aromatic nitrile
benzyl alcoholC7H8O0.600.520.98aromatic alcohol
bis(2-chloroethyl) etherC4H8Cl2O0.000.400.82halo ether
bis(2-methoxyethyl) etherC6H14O30.000.400.64ether
bromobenzeneC6H5Br0.000.060.79aromatic halo
butanenitrileC4H7N0.000.400.71nitrile
butanoic acidC4H8O21.100.450.56carboxylic_acid
butanolC4H10O0.840.840.47alcohol
butyl acetateC6H12O20.000.450.46ester
butylamineC4H11N0.000.720.31amine
carbon disulfideCS20.000.070.61
chloroacetonitrileC2H2ClN0.000.341.01halo nitrile
chlorobenzeneC6H5Cl0.000.070.71aromatic halo
cis-decalinC10H180.000.080.11alkane cycloalkane
cyclohexaneC6H120.000.000.00alkane cycloalkane
cyclohexanolC6H12O0.660.840.45alcohol
cyclohexanoneC6H10O0.000.530.76ketone
cyclopentanoneC5H8O0.000.520.76ketone
decaneC10H220.000.000.03alkane
decanolC10H22O0.700.820.45alcohol
di-n-butyl sulfideC8H18S0.000.380.36
dibenzyl etherC14H14O0.000.410.80aromatic ether
dibromomethaneCH2Br20.000.000.92halo
dibutyl etherC8H18O0.000.460.27ether
dichloromethaneCH2Cl20.130.100.82halo