Swain Acity and Basity

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Orthogonal solvent "acity" (anion solvation) and "basity" (cation solvation) properties according to Swain et al..
C. G. Swain, M. S. Swain, A. L. Powell and S. Alunni; "Solvent effects on chemical reactivity. Evaluation of anion- and cation-solvation components" J. Am. Chem. Soc. 105 (1983) 502-513.

Acity is measure of hydrogen bond acidity and is correlated with →Dimroth-Reichardt E_T (→E_T vs Acity) and →Gutmann AN (→AN vs Acity).
Basity has some correlation with →Catalán SPP (→SPP vs Basity)

Name	Acity	Basity
2,2,4,4-tetramethylpentane	0.01	-0.03
hexane	0.01	-0.01
heptane	0.00	0.00
trifluoroacetic acid	1.72	0.00
cyclohexane	0.02	0.06
acetic acid	0.93	0.13
triethylamine	0.08	0.19
tetrachloroethene	0.10	0.25
dibutyl ether	0.06	0.28
diethyl ether	0.12	0.34
tetrachloromethane	0.09	0.34
carbon disulfide	0.10	0.38
butanol	0.61	0.43
2-propanol	0.59	0.44
propanol	0.63	0.44
ethanol	0.66	0.45
1,2-dimethoxyethane	0.21	0.50
1,4-dimethylbenzene	0.06	0.50
1,3-dimethylbenzene	0.04	0.50
methanol	0.75	0.50
2-methyl-2-propanol	0.45	0.50
formic acid	1.18	0.51
1,2-dimethylbenzene	0.06	0.53
toluene	0.13	0.54
trichloroethene	0.16	0.54
benzene	0.15	0.59
ethyl acetate	0.21	0.59
chlorobenzene	0.20	0.65
bromobenzene	0.22	0.66
dioxane	0.19	0.67
tetrahydrofuran	0.17	0.67
trichloromethane	0.42	0.73
methoxybenzene	0.21	0.74
2-butanone	0.23	0.74
cyclohexanone	0.25	0.79
dichloromethane	0.33	0.80
2,6-dimethylpyridine	0.18	0.81
2-propanone	0.25	0.81
1,2-dichloroethane	0.30	0.82
ethanediol	0.78	0.84
nitrobenzene	0.29	0.86
acetonitrile	0.37	0.86
benzonitrile	0.30	0.87
acetophenone	0.23	0.90
nitromethane	0.39	0.92
N,N-dimethylformamide	0.30	0.93
pyridine	0.24	0.96
N,N-dimethylacetamide	0.27	0.97
formamide	0.66	0.99
water	1.00	1.00
hexamethylphosphoramide	0.00	1.07
N-methylaniline	0.40	1.07
dimethyl sulfoxide	0.34	1.08
butylamine	0.15	1.17
aniline	0.36	1.19

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