SCHEDULED MAINTENANCE
I.r. band shapes and electric dipole moments show that the predominant conformers for tetrahydro-1,3-oxazine, tetrahydro-1,3-thiazine, and 1-t-butylhexahydropyrimidine are those with the NH axial; the predominant conformer for tetrahydro-1,2-oxazine is that with NH equatorial as determined by the same methods.
R. A. Y. Jones, A. R. Katritzky, A. C. Richards, S. Saba, A. J. Sparrow and D. L. Trepanier, J. Chem. Soc., Chem. Commun., 1972, 673 DOI: 10.1039/C39720000673
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