The Gutmann Acceptor (AN) and
Donor number (DN) are measures of the
strength of solvents as Lewis acids or bases.
The Acceptor Number is based on the 31P-NMR chemical shift of
triethylphosphine oxide in the solvent.
The Donor Number is based on the heat of reaction between the 'solvent' and
SbCl5
in CH2ClCH2Cl
.
Gutmann's AN and DN values| Name | CAS nr | AN | DN | | 1,2-diaminoethane | 107-15-3 | 20.9 | 55 | | 1,2-dichloroethane | 107-06-2 | 16.7 | 0 | | 1,2-dimethoxyethane | 110-71-4 | 10.2 | 20 | | 2-methyl-2-propanol | 75-65-0 | 27.1 | 21.9 | | 2-phenylethanol | 60-12-8 | 33.8 | 23 | | 2-propanol | 67-63-0 | 33.8 | 21.1 | | 2-propanone | 67-64-1 | 12.5 | 17 | | 4-methyl-2-oxo-1,3-dioxolane | 108-32-7 | 18.3 | 15.1 | | acetic acid | 64-19-7 | 52.9 | 20 | | acetonitrile | 75-05-8 | 18.9 | 14.1 | | benzene | 71-43-2 | 8.2 | 0.1 | | benzonitrile | 100-47-0 | 15.5 | 11.9 | | benzyl alcohol | 100-51-6 | 36.8 | 23 | | butanol | 71-36-3 | 36.8 | 19.5 | | dichloromethane | 75-09-2 | 20.4 | 1 | | diethylamine | 109-89-7 | 9.4 | 50 | | dimethyl sulfoxide | 67-68-5 | 19.3 | 29.8 | | dioxane | 123-91-1 | 10.3 | 14.3 | | ethanol | 64-17-5 | 37.9 | 19.2 | | ethyl acetate | 141-78-6 | 9.3 | 17.1 | | formamide | 75-12-7 | 39.8 | 24 | | formic acid | 64-18-6 | 83.6 | 19 | | heptane | 142-82-5 | 0 | 0 | | hexamethylphosphoramide | 680-31-9 | 10.6 | 38.8 | | hexane | 110-54-3 | 0 | 0 | | methanol | 67-56-1 | 41.5 | 19 | | methyl acetate | 79-20-9 | 10.7 | 16.3 | | N,N,N',N'-tetramethylurea | 632-22-4 | 9.2 | 31 | | N,N-diethylacetamide | 685-91-6 | 13.6 | 32.2 | | N,N-dimethylacetamide | 127-19-5 | 13.6 | 27.8 | | N,N-dimethylformamide | 68-12-2 | 16 | 26.6 | | N-methylformamide | 123-39-7 | 32.1 | 27 | | N-methylpyrrolidon | 872-50-4 | 13.3 | 27.3 | | nitrobenzene | 98-95-3 | 14.8 | 4.4 | | nitromethane | 75-52-5 | 20.5 | 2.7 | | oxolan-2-one | 96-48-0 | 17.3 | 18 | | propanol | 71-23-8 | 37.3 | 19.8 | | pyridine | 110-86-1 | 14.2 | 33.1 | | sulfolane | 126-33-0 | 19.2 | 14.8 | | tetrachloromethane | 56-23-5 | 8.6 | 0 | | tetrahydrofuran | 109-99-9 | 8 | 20 | | tributyl phosphate | 126-73-8 | 9.9 | 23.7 | | trichloromethane | 67-66-3 | 23.1 | 4 | | triethylamine | 121-44-8 | 1.4 | 61 | | trimethyl phosphate | 512-56-1 | 16.3 | 23 | | water | 7732-18-5 | 54.8 | 18 |
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