Effects of the medium in NMR Communication 5. Influence of the solvent on the magnetic nonequivalence of the methylene protons in komeric halobutylamines
The PMR spectra of solutions of hydrohalides of isomeric halobutylamines in trifluoroacetic acid and pyridine were studied.
The terminal methylene protons, found in theα- andΒ-positions to the ammonium groups, may possess magnetic nonequivalence, which increases from solutions in trifluoroacetic acid to solutions in pyridine.
KeywordsMethylene Ammonium Pyridine Trifluoroacetic Acid Methylene Proton
Unable to display preview. Download preview PDF.
- 1.T. H. Siddal and W. E. Stewart, Progress in NMR Spectroscopy, Vol. 5, Pergamon Press, Oxford (1969), p. 33.Google Scholar
- 2.K. Mislow and M. Raban, in: Selected Problems of Stereochemistry [Russian translation], Mir (1970), p. 9.Google Scholar
- 3.O. A. Reutov, A. S. Gudkova, and I. V. Petrosyan, Izv. Akad. Nauk SSSR, Ser. Khim., 213 (1972); Dokl. Akad. Nauk SSSR,203, 354 (1972).Google Scholar
- 4.F. A. Bovey, NMR Spectroscopy, Academic Press, New York (1969), pp. 60, 61.Google Scholar
- 5.N. Bhacca and D. H. Williams, The Use of NMR in Organic Chemistry [Russian translation], Mir, (1966), p. 66.Google Scholar
- 6.F. Caesar and W. D. Balzer, Chem. Ber.,102, 1665 (1969).Google Scholar
- 7.M. L. Martin, F. Lefevre, D. Lapeyre, G. J. Martin, and R. Maution, Organic Magnetic Resonance,1, 19 (1969).Google Scholar