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
2-methyl-2-propanol	C₄H₁₀O	0.42	0.93	0.41	alcohol
butanol	⋮	0.84	0.84	0.47	alcohol
diethyl ether	⋮	0.00	0.47	0.27	ether
1,2-dimethoxyethane	C₄H₁₀O₂	0.00	0.41	0.53	ether
diethyl sulfide	C₄H₁₀S	0.00	0.37	0.46
butylamine	C₄H₁₁N	0.00	0.72	0.31	amine
diethylamine	⋮	0.30	0.70	0.24	amine
tetramethylsilane	C₄H₁₂Si	0.00	0.02	-0.09
pentafluoropyridine	C₅F₅N	0.00	0.16	0.53	halo heteroaromatic
2-bromopyridine	C₅H₄BrN	0.00	0.53	1.00	halo heteroaromatic
3-bromopyridine	⋮	0.00	0.60	0.89	halo heteroaromatic
2-fluoropyridine	C₅H₄FN	0.00	0.51	0.84	halo heteroaromatic
pyridine	C₅H₅N	0.00	0.64	0.87	heteroaromatic
cyclopentanone	C₅H₈O	0.00	0.52	0.76	ketone
N-methylpyrrolidone	C₅H₉NO	0.00	0.77	0.92	amide
2-methyltetrahydrofuran	C₅H₁₀O	0.00	0.45	…	ether
2-pentanone	⋮	0.00	0.52	0.65	ketone
3-pentanone	⋮	0.00	0.45	0.72	ketone
oxane	⋮	0.00	0.54	0.51	ether
pentanoic acid	C₅H₁₀O₂	1.19	0.45	0.54
propyl acetate	⋮	0.00	0.40	…	ester
diethyl carbonate	C₅H₁₀O₃	0.00	0.40	0.45	ester
thiane	C₅H₁₀S	0.00	0.36	0.61
piperidine	C₅H₁₁N	0.00	1.04	0.30	amine
N,N-diethylformamide	C₅H₁₁NO	0.00	0.79	…	amide