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-ethyl-3-methyl-1H-imidazol-3-ium hexyl sulfate	C₁₂H₂₄N₂O₄S	0.65	0.71	0.98
1-ethyl-3-methyl-1H-imidazol-3-ium octyl sulfate	C₁₄H₂₈N₂O₄S	0.65	0.77	0.93
1-ethyl-3-methyl-1H-imidazol-3-ium perchlorate	C₆H₁₁ClN₂O₄	0.56	0.41	1.11
1-ethyl-3-methylimidazolium acetate	C₈H₁₄N₂O₂	0.40	0.95	1.09
1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide	C₈H₁₁F₆N₃O₄S₂	0.76	0.28	0.90
1-ethyl-3-methylimidazolium nitrate	C₆H₁₁N₃O₃	0.48	0.66	1.13
1-ethyl-3-methylimidazolium tetrafluoroborate	C₆H₁₁BF₄N₂	0.70	0.26	1.03
1-hexyl-3-methyl-1H-imidazol-3-ium bis[(trifluoromethyl)sulfonyl]azanide	C₁₂H₁₉F₆N₃O₄S₂	0.65	0.25	0.98
1-iodobutane	C₄H₉I	0.00	0.23	0.47	halo amine
1-methylazepan-2-one	C₇H₁₃NO	0.00	0.69	…	amide
2,2,2-trifluoroethanol	C₂H₃F₃O	1.51	0.00	0.73	halo alcohol
2,6-dimethylpyridine	C₇H₉N	0.00	0.76	0.80	heteroaromatic
2-bromopyridine	C₅H₄BrN	0.00	0.53	1.00	halo heteroaromatic
2-butanol	C₄H₁₀O	0.69	0.80	0.40	alcohol
2-butanone	C₄H₈O	0.06	0.48	0.67	ketone
2-chloroaniline	C₆H₆ClN	0.25	0.40	0.83	aromatic halo amine
2-chloroethanol	C₂H₅ClO	1.28	0.53	0.46	halo alcohol
2-cyanopyridine	C₆H₄N₂	0.00	0.29	1.20	nitrile heteroaromatic
2-fluoropyridine	C₅H₄FN	0.00	0.51	0.84	halo heteroaromatic
2-heptanone	C₇H₁₄O	0.05	0.48	0.61	ketone
2-methyl-1-propanol	C₄H₁₀O	0.79	0.84	0.40	alcohol
2-methyl-2-butanol	C₅H₁₂O	0.28	0.93	0.40	alcohol
2-methyl-2-propanol	C₄H₁₀O	0.42	0.93	0.41	alcohol
2-methylbutane	C₅H₁₂	0.00	0.01	-0.08	alkane
2-methyltetrahydrofuran	C₅H₁₀O	0.00	0.45	…	ether