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 E_T 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 E_T (→E_T 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 →Catalán SPP (→SPP vs π^*).

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Name	Formula	α	β	π^*	🏷 Tag
1,3-dimethylbenzene	C₈H₁₀	0.00	0.11	0.47	aromatic
1-iodobutane	C₄H₉I	0.00	0.23	0.47	halo amine
butanol	C₄H₁₀O	0.84	0.84	0.47	alcohol
1,1-dichloroethane	C₂H₄Cl₂	0.10	0.10	0.48	halo
2-propanol	C₃H₈O	0.76	0.84	0.48	alcohol
1,1,1-trichloroethane	C₂H₃Cl₃	0.00	0.00	0.49	halo
1-bromobutane	C₄H₉Br	0.00	0.13	0.50	halo
heptanoic acid	C₇H₁₄O₂	1.20	0.45	0.50	carboxylic_acid
oxane	C₅H₁₀O	0.00	0.54	0.51	ether
2-propen-1-ol	C₃H₆O	0.84	0.90	0.52	alcohol
hexanoic acid	C₆H₁₂O₂	1.22	0.45	0.52	carboxylic_acid
propanol	C₃H₈O	0.84	0.90	0.52	alcohol
1,2-dimethoxyethane	C₄H₁₀O₂	0.00	0.41	0.53	ether
pentafluoropyridine	C₅F₅N	0.00	0.16	0.53	halo heteroaromatic
trichloroethene	C₂HCl₃	0.00	0.05	0.53	halo alkene
ethanol	C₂H₆O	0.86	0.75	0.54	alcohol
pentanoic acid	C₅H₁₀O₂	1.19	0.45	0.54
toluene	C₇H₈	0.00	0.11	0.54	aromatic
dioxane	C₄H₈O₂	0.00	0.37	0.55	ether
ethyl acetate	⋮	0.00	0.45	0.55	ester
butanoic acid	⋮	1.10	0.45	0.56	carboxylic_acid
dimethyl sulfide	C₂H₆S	0.00	0.34	0.57
1,4-difluorobenzene	C₆H₄F₂	0.00	0.03	0.58	aromatic halo
propanoic acid	C₃H₆O₂	1.12	0.45	0.58
tetrahydrofuran	C₄H₈O	0.00	0.55	0.58	ether