Abstract
AN investigation of the influence of the solvent on the dipole moments of aliphatic and aromatic amines was commenced some years ago1; but many of the results have not yet been published. A recent paper2 has duplicated some of the work of this research. The accompanying table includes a selection of the measurements of the dipole moments of amines, some of which have not previously been determined. In the case of n-propyl and n-butyl-amines, the substituted anilines, with the exception of n-propyl and ethyl-n-propylanilines, and diphenyl-amine, which were investigated in benzene at 25° by Le Fèvre et al.2, the agreement between the two sets of results is very good. No values of the dipole moments of di-n-propyl, tri-n-propyl, di-n-butyl-amines, n-propyl and ethyl-n-propylanilines, and of the other compounds in solvents other than benzene, are available. In the aromatic series, aniline has been studied in solution1,3 and aniline and dimethylaniline in the vapour state4.
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References
Cowley and Partington, J. Chem. Soc., 1598 (1938).
Barclay, Le Fèvre and Smythe, Trans. Farad. Soc., 47, 357 (1951).
See, for example, Le Fèvre, Roberts and Smythe, J. Chem. Soc., 902 (1949). Few and Smith, J. Chem. Soc., 3057 (1949).
Groves and Sugden, J. Chem. Soc., 1782 (1937).
μ = 1.68 D. in benzene at 20°: Cowley and Partington, J. Chem. Soc., 1255 (1933).
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COWLEY, E. Dipole Moments of Aliphatic and Aromatic Amines. Nature 168, 705–706 (1951). https://doi.org/10.1038/168705b0
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DOI: https://doi.org/10.1038/168705b0
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