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
furan	C₄H₄O	0.14	…	heteroaromatic
heptane	C₇H₁₆	0.00	-0.08	alkane
hexafluorobenzene	C₆F₆	0.02	0.33	aromatic halo
hexamethylphosphoramide	C₆H₁₈N₃OP	1.05	0.87
hexane	C₆H₁₄	0.00	-0.04	alkane
iodobenzene	C₆H₅I	0.06	0.81	aromatic halo
methoxybenzene	C₇H₈O	0.32	0.73	aromatic ether
methyl acetate	C₃H₆O₂	0.42	0.60	ester
methyl benzoate	C₈H₈O₂	0.38	…	aromatic ester
methyl formate	C₂H₄O₂	0.37	0.62	ester
methyl propanoate	C₄H₈O₂	0.27	…	ester
N,N,N',N'-tetramethylurea	C₅H₁₂N₂O	0.80	0.83	amide
N,N-diethylacetamide	C₆H₁₃NO	0.78	0.84	amide
N,N-diethylformamide	C₅H₁₁NO	0.79	…	amide
N,N-dimethylacetamide	C₄H₉NO	0.76	0.88	amide
N,N-dimethylaniline	C₈H₁₁N	0.43	0.73	amine aromatic
N,N-dimethylbenzylamine	C₉H₁₃N	0.64	0.45	amine aromatic
N,N-dimethylcyclohexylamine	C₈H₁₇N	0.84	0.23	amine
N,N-dimethylformamide	C₃H₇NO	0.69	0.88	amide
N-methylpyrrolidone	C₅H₉NO	0.77	0.92	amide
nitrobenzene	C₆H₅NO₂	0.30	1.01	nitro aromatic
octadecafluoronaphthalene	C₁₀F₁₈	-0.05	-0.32	aromatic halo
octane	C₈H₁₈	0.00	0.01	alkane
oxane	C₅H₁₀O	0.54	0.51	ether
oxolan-2-one	C₄H₆O₂	0.49	0.87	ester