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
N,N-dimethylformamide	C₃H₇NO	0.00	0.69	0.88	amide
N-methylacetamide	⋮	0.47	0.80	1.01	amide
N-methylaniline	C₇H₉N	0.17	0.47	0.82	amine aromatic
N-methylformamide	C₂H₅NO	0.62	0.80	0.90	amide
N-methylpyrrolidone	C₅H₉NO	0.00	0.77	0.92	amide
nitrobenzene	C₆H₅NO₂	0.00	0.30	1.01	nitro aromatic
nitromethane	CH₃NO₂	0.22	0.06	0.85	nitro
octadecafluoronaphthalene	C₁₀F₁₈	0.00	-0.05	-0.32	aromatic halo
octane	C₈H₁₈	0.00	0.00	0.01	alkane
octanol	C₈H₁₈O	0.77	0.81	0.40	alcohol
oxane	C₅H₁₀O	0.00	0.54	0.51	ether
oxolan-2-one	C₄H₆O₂	0.00	0.49	0.87	ester
pentafluoropyridine	C₅F₅N	0.00	0.16	0.53	halo heteroaromatic
pentane	C₅H₁₂	0.00	0.00	-0.08	alkane
pentanoic acid	C₅H₁₀O₂	1.19	0.45	0.54
pentanol	C₅H₁₂O	0.84	0.86	0.40	alcohol
perfluoro(methylcyclohexane)	C₇F₁₄	0.00	-0.06	-0.40	halo
phenol	C₆H₆O	1.65	0.30	0.72
piperidine	C₅H₁₁N	0.00	1.04	0.30	amine
propanenitrile	C₃H₅N	0.00	0.39	0.71	nitrile
propanoic acid	C₃H₆O₂	1.12	0.45	0.58
propanol	C₃H₈O	0.84	0.90	0.52	alcohol
propyl acetate	C₅H₁₀O₂	0.00	0.40	…	ester
pyridine	C₅H₅N	0.00	0.64	0.87	heteroaromatic
pyrrolidine	C₄H₉N	0.16	0.70	0.39