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	β	π^*	🏷 Tag
2-pentanone	C₅H₁₀O	0.52	0.65	ketone
2-phenylacetonitrile	C₈H₇N	0.41	1.00	aromatic nitrile
3,4-dimethylpyridine	C₇H₉N	0.78	0.73	heteroaromatic
3-bromopyridine	C₅H₄BrN	0.60	0.89	halo heteroaromatic
3-pentanone	C₅H₁₀O	0.45	0.72	ketone
4-methyl-2-oxo-1,3-dioxolane	C₄H₆O₃	0.40	0.83	ester
4-methylpyridine	C₆H₇N	0.67	0.84	heteroaromatic
acetic anhydride	C₄H₆O₃	0.29	0.76
benzene	C₆H₆	0.10	0.59	aromatic
benzonitrile	C₇H₅N	0.37	0.90	aromatic nitrile
bis(2-chloroethyl) ether	C₄H₈Cl₂O	0.40	0.82	halo ether
bis(2-methoxyethyl) ether	C₆H₁₄O₃	0.40	0.64	ether
bromobenzene	C₆H₅Br	0.06	0.79	aromatic halo
butanenitrile	C₄H₇N	0.40	0.71	nitrile
butyl acetate	C₆H₁₂O₂	0.45	0.46	ester
butylamine	C₄H₁₁N	0.72	0.31	amine
carbon disulfide	CS₂	0.07	0.61
chloroacetonitrile	C₂H₂ClN	0.34	1.01	halo nitrile
chlorobenzene	C₆H₅Cl	0.07	0.71	aromatic halo
cis-decalin	C₁₀H₁₈	0.08	0.11	alkane cycloalkane
cyclohexane	C₆H₁₂	0.00	0.00	alkane cycloalkane
cyclohexanone	C₆H₁₀O	0.53	0.76	ketone
cyclopentanone	C₅H₈O	0.52	0.76	ketone
decane	C₁₀H₂₂	0.00	0.03	alkane
di-n-butyl sulfide	C₈H₁₈S	0.38	0.36