An improved technique for the measurement of electric dipole moments is described. The dipole moments of 1-alkyl-4-t-butylpiperazines indicate that the axial–equatorial conformational equilibria for N-methyl and N-ethyl groups is predominantly in favour of the conformer with axial lone pair and equatorial alkyl group.
J.-L. Imbach, R. A. Y. Jones, A. R. Katritzky and R. J. Wyatt, J. Chem. Soc. B, 1967, 499 DOI: 10.1039/J29670000499
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