Kamlet-Taft solvent parameters

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 is the main reason it differs from other measures of hydrogen bond acidity, e.g. E_T and AN.

Sometimes a "polarity correction term" (fudge factor), δ, is also used. For aromatics δ=1.0, for polychlorinated compounds δ=0.5, and for all other solvents δ=0.0 .

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^*).

Name	α	β	π*
tetradecafluorohexane	0.00	-0.08	-0.41
perfluoro(methylcyclohexane)	0.00	-0.06	-0.40
octadecafluoronaphthalene	0.00	-0.05	-0.32
tetramethylsilane	0.00	0.02	-0.09
pentane	0.00	0.00	-0.08
heptane	0.00	0.00	-0.08
2-methylbutane	0.00	0.01	-0.08
hexane	0.00	0.00	-0.04
cyclohexane	0.00	0.00	0.00
octane	0.00	0.00	0.01
decane	0.00	0.00	0.03
dodecane	0.00	0.00	0.05
cis-decalin	0.00	0.08	0.11
triethylamine	0.00	0.71	0.14
tributylamine	0.00	0.62	0.16
N,N-dimethylcyclohexylamine	0.00	0.84	0.23
diethylamine	0.30	0.70	0.24
dibutyl ether	0.00	0.46	0.27
diethyl ether	0.00	0.47	0.27
diisopropyl ether	0.00	0.49	0.27
dipropyl ether	0.00	0.46	0.27
tetrachloromethane	0.00	0.10	0.28
tetrachloroethene	0.00	0.05	0.28
piperidine	0.00	1.04	0.30
butylamine	0.00	0.72	0.31
hexafluorobenzene	0.00	0.02	0.33
di-n-butyl sulfide	0.00	0.38	0.36
diisopropyl sulfide	0.00	0.38	0.36
morpholine	0.29	0.70	0.39
1-chlorobutane	0.00	0.00	0.39
pyrrolidine	0.16	0.70	0.39
2-butanol	0.69	0.80	0.40
3-methyl-1-butanol	0.84	0.86	0.40
octanol	0.77	0.81	0.40
hexanol	0.80	0.84	0.40
2-methyl-1-propanol	0.79	0.84	0.40
pentanol	0.84	0.86	0.40
2-methyl-2-butanol	0.28	0.93	0.40
2-methyl-2-propanol	0.42	0.93	0.41
1,3,5-trimethylbenzene	0.00	0.13	0.41
1,4-dimethylbenzene	0.00	0.12	0.43
trans-1,2-dichloroethene	0.00	0.00	0.44
cyclohexanol	0.66	0.84	0.45
diethyl carbonate	0.00	0.40	0.45
decanol	0.70	0.82	0.45
N,N-dimethylbenzylamine	0.00	0.64	0.45
butyl acetate	0.00	0.45	0.46
diethyl sulfide	0.00	0.37	0.46
2-chloroethanol	1.28	0.53	0.46
butanol	0.84	0.84	0.47
1,2-diaminoethane	0.13	1.43	0.47
1,3-dimethylbenzene	0.00	0.11	0.47
1-iodobutane	0.00	0.23	0.47
2-propanol	0.76	0.84	0.48
1,1-dichloroethane	0.10	0.10	0.48
1,1,1-trichloroethane	0.00	0.00	0.49
heptanoic acid	1.20	0.45	0.50
1-bromobutane	0.00	0.13	0.50
oxane	0.00	0.54	0.51
propanol	0.84	0.90	0.52
2-propen-1-ol	0.84	0.90	0.52
hexanoic acid	1.22	0.45	0.52
pentafluoropyridine	0.00	0.16	0.53
1,2-dimethoxyethane	0.00	0.41	0.53
trichloroethene	0.00	0.05	0.53
toluene	0.00	0.11	0.54
ethanol	0.86	0.75	0.54
pentanoic acid	1.19	0.45	0.54
ethyl acetate	0.00	0.45	0.55
dioxane	0.00	0.37	0.55
butanoic acid	1.10	0.45	0.56
dimethyl sulfide	0.00	0.34	0.57
propanoic acid	1.12	0.45	0.58
1,4-difluorobenzene	0.00	0.03	0.58
trichloromethane	0.20	0.10	0.58
tetrahydrofuran	0.00	0.55	0.58
benzene	0.00	0.10	0.59
methanol	0.98	0.66	0.60
methyl acetate	0.00	0.42	0.60
ethyl formate	0.00	0.36	0.61
thiane	0.00	0.36	0.61
ethyl trichloroacetate	0.00	0.25	0.61
carbon disulfide	0.00	0.07	0.61
2-heptanone	0.05	0.48	0.61
fluorobenzene	0.00	0.07	0.62
methyl formate	0.00	0.37	0.62
tribromomethane	0.05	0.05	0.62
1,2,3-propanetriol	1.21	0.51	0.62
thiolane	0.00	0.44	0.62
bis(2-methoxyethyl) ether	0.00	0.40	0.64
acetic acid	1.12	0.45	0.64
4-methyl-2-pentanone	0.02	0.48	0.65
formic acid	1.23	0.38	0.65
tributyl phosphate	0.00	0.80	0.65
2-pentanone	0.00	0.52	0.65
1,1,1,3,3,3-hexafluoro-2-propanol	1.96	0.00	0.65
diiodomethane	0.00	0.00	0.65
diphenyl ether	0.00	0.13	0.66
2-butanone	0.06	0.48	0.67
3-methylphenol	1.13	0.34	0.68
4-methylphenol	1.64	0.34	0.68
1,3-dioxolane	0.00	0.45	0.69
ethoxybenzene	0.00	0.30	0.69
ethyl chloroacetate	0.00	0.35	0.70
chlorobenzene	0.00	0.07	0.71
butanenitrile	0.00	0.40	0.71
propanenitrile	0.00	0.39	0.71
2-propanone	0.08	0.43	0.71
3-pentanone	0.00	0.45	0.72
triethyl phosphate	0.00	0.77	0.72
dimethylcyanamide	0.00	0.64	0.72
phenol	1.65	0.30	0.72
trimethyl phosphate	0.00	0.77	0.72
3,4-dimethylpyridine	0.00	0.78	0.73
aniline	0.26	0.50	0.73
2,2,2-trifluoroethanol	1.51	0.00	0.73
methoxybenzene	0.00	0.32	0.73
N,N-dimethylaniline	0.00	0.43	0.73
ethyl benzoate	0.00	0.41	0.74
acetonitrile	0.19	0.40	0.75
1,3-dichlorobenzene	0.00	0.03	0.75
1,2-dibromoethane	0.00	0.00	0.75
cyclopentanone	0.00	0.52	0.76
acetic anhydride	0.00	0.29	0.76
cyclohexanone	0.00	0.53	0.76
1,1,3,3-tetramethylguanidine	0.00	0.86	0.76
3-chlorophenol	1.57	0.23	0.77
bromobenzene	0.00	0.06	0.79
2,6-dimethylpyridine	0.00	0.76	0.80
1,2-dichlorobenzene	0.00	0.03	0.80
dibenzyl ether	0.00	0.41	0.80
1,2-dichloroethane	0.00	0.10	0.81
iodobenzene	0.00	0.06	0.81
dimethyl phthalate	0.00	0.78	0.82
N-methylaniline	0.17	0.47	0.82
dichloromethane	0.13	0.10	0.82
bis(2-chloroethyl) ether	0.00	0.40	0.82
N,N,N',N'-tetramethylurea	0.00	0.80	0.83
4-methyl-2-oxo-1,3-dioxolane	0.00	0.40	0.83
2-chloroaniline	0.25	0.40	0.83
N,N-diethylacetamide	0.00	0.78	0.84
4-methylpyridine	0.00	0.67	0.84
2-fluoropyridine	0.00	0.51	0.84
2-pyrrolidone	0.36	0.77	0.85
nitromethane	0.22	0.06	0.85
pyridine	0.00	0.64	0.87
hexamethylphosphoramide	0.00	1.05	0.87
oxolan-2-one	0.00	0.49	0.87
N,N-dimethylformamide	0.00	0.69	0.88
N,N-dimethylacetamide	0.00	0.76	0.88
2-phenylethanol	0.64	0.61	0.88
3-bromopyridine	0.00	0.60	0.89
1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide	0.76	0.28	0.90
acetophenone	0.04	0.49	0.90
N-methylformamide	0.62	0.80	0.90
benzonitrile	0.00	0.37	0.90
dibromomethane	0.00	0.00	0.92
N-methylpyrrolidone	0.00	0.77	0.92
ethanediol	0.90	0.52	0.92
quinoline	0.00	0.64	0.92
1-ethyl-3-methyl-1H-imidazol-3-ium octyl sulfate	0.65	0.77	0.93
3-phenylpropanol	0.53	0.55	0.95
1,1,2,2-tetrachloroethane	0.00	0.00	0.95
3-methyl-1-octyl-1H-imidazol-3-ium bis[(trifluoromethyl)sulfonyl]azanide	0.97	0.28	0.97
formamide	0.71	0.48	0.97
1-hexyl-3-methyl-1H-imidazol-3-ium bis[(trifluoromethyl)sulfonyl]azanide	0.65	0.25	0.98
sulfolane	0.00	0.39	0.98
benzyl alcohol	0.60	0.52	0.98
1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide	0.62	0.24	0.98
1-ethyl-3-methyl-1H-imidazol-3-ium hexyl sulfate	0.65	0.71	0.98
1-ethyl-3-methyl-1H-imidazol-3-ium hexafluorophosphate	0.76	0.20	0.99
2-phenylacetonitrile	0.00	0.41	1.00
2-bromopyridine	0.00	0.53	1.00
dimethyl sulfoxide	0.00	0.76	1.00
1-butyl-3-methyl-1H-imidazol-3-ium trifluoromethanesulfonate	0.63	0.46	1.01
nitrobenzene	0.00	0.30	1.01
chloroacetonitrile	0.00	0.34	1.01
N-methylacetamide	0.47	0.80	1.01
1-ethyl-3-methylimidazolium tetrafluoroborate	0.70	0.26	1.03
thiolane-1-oxide	0.00	0.81	1.06
1-ethyl-3-methyl-1H-imidazol-3-ium dicyanoazanide	0.53	0.35	1.08
1-ethyl-3-methylimidazolium acetate	0.40	0.95	1.09
water	1.17	0.47	1.09
1-ethyl-3-methyl-1H-imidazol-3-ium perchlorate	0.56	0.41	1.11
1-ethyl-3-methylimidazolium nitrate	0.48	0.66	1.13
2-cyanopyridine	0.00	0.29	1.20