Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Effects of Li$^+$ and Ag$^+$ Ions on the Rotational Barrier in Acetamide and propionamide System

  • Kwon, Dae-Keun (Department of Chemistry, Korea University) ;
  • Choi, Young-Sang (Department of Chemistry, Korea University) ;
  • Yoon, Chang-Ju (Department of Chemistry, Song Sim College for Women)
  • Published : 1986.02.20
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Abstract

The influences of $LiNO_3\;and\;AgNO_3$ on the N-C(O) rotational barrier of N,N-dimethylacetamide and N,N-dimethylpropionamide have been investigated. The rotational activation free energy $({\Delta}G^{\neq})\;for\;Li^{+}$-amide complexes is found to increase with increasing salt concentration. On the other hand, that for $Ag^+$-amide complexes increases in the presence of $Ag^+$ ion up to 0.25 M ion concentration and then decreases as the concentration of $Ag^+$ ion is further increased. Such an unusual behavior of $Ag^+$-amide complexes has been interpreted in terms of ion-pairing and diluent effect on the amides. However, $^{13}C$ nmr chemical shift data for the amides have shown that both of these ions interact primarily with the carbonyl group in amides.

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References

  1. tert., Chem. Rev. v.70 W.E. Stewart;T.H. Siddall
  2. J. Am. Chem. Soc. v.84 J.C. Woodbrey;M.T. Rogers
  3. J. Chem. Phys. v.42 A.G. Whittaker;S. Siegel
  4. Biological Macromolecules v.II P.H. von Hipplel;T. Schleich;S.N. Timasheff(ed.);G.D. Fasman(ed.)
  5. Bioinorganic Chemistry H. Freeman;G.L. Eichorn(ed.)
  6. J. Phys. Chem. v.73 P.A. Temussi;T. Tancredi;F. Quadrifoglio
  7. J. Chem. Soc. Faraday Trans. I v.78 W.E. Waghorne;H. Rubalcava
  8. Spectrochim. Acta A v.31 C.N.R. Rao;H.S. Randhawa;N.V.R. Reddy;D. Chakravorty
  9. Biochemistry v.5 J. Bello;D. Hass;H.R. Bello
  10. J.C.S. Faraday I v.76 C.P. Rao;P. Balaram;C.N.R. Rao
  11. M.S. thesis, Korea University You-Hyuk Kim
  12. J.C.S. Faraday v.71 M.J. Adams;C.B. Baddiel;G.E. Ellis;R.G. Jones;A.J. Matheson
  13. Science and Tech., Korea University v.22 Y.S. Choi(et al.)
  14. M.S. thesis, Korea University Dae-Ho Shin
  15. The Nature of the Chemical Bond L. Pauling
  16. J. Chem. Phys. v.25 H.S. Gutowsky;C.H. Holm
  17. J.C.S. Faraday I v.76 W.E. Waghorne;A.J.I. Ward
  18. J.C.S. Faraday II v.71 B.M. Rode;R. Fussenegger
  19. Advanced Inorganic Chemistry F.A. Cotton;G. Wilkinson
  20. Bull. Chem. Soc. Japan v.48 I. Ando;N. Jinno;A. Nishioka
  21. Trans. Faraday Soc. v.57 J.E. Prue;P.J. Sherrington
  22. J. Am. Chem. Soc. v.96 A. Johansson;P. Kollman;S. Rothenberg;J. McKelvey
  23. J. Am. Chem. Soc. v.100 J.E. Del Bene