Bulletin of the Korean Chemical Society

  • 제19권12호
  • /
  • Pages.1326-1333
  • /
  • 1998
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지
DOI QR코드

DOI QR Code

An NMR Study on Dynamics of$ AX_3$ Spin System as Illustrated By Methyl Group in 2,6-Dichlorotoluene

  • 발행 : 1998.12.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The study of coupled relaxation for methyl spin system in 2,6-dichlorotoluene was performed on the basis of the magnetization mode formalism. Using five initial perturbing pulse sequences, eight experimntal data sets were obtained, which were fitted with theoretical expressions with nine spectral density parameters. The same experiment was carried out at both 50.3 MHz and 125.6 MHz in carbon frequency. The measured spectral densities at both fields are similar in the exception of that related with carbon random field term. Furthermore, from the dipolar spectral density, the physical values may be extracted depending on the model of molecular reorientation. For example, it was assumed that the molecular framework undergoes asymmetric diffusive rotational process and methyl group reorients by either diffusive rotation about its symmetry axis or jump among internal rotational potential minima.

키워드

참고문헌

  1. J. Chem. Phys. v.73 Versmold, H.
  2. Chem. Phys. Lett. v.93 Chung, D.S.;Kim, B.S.;Lee, J.W.;Shin, K.J.
  3. J. Chem. Phys. v.47 Wallach, D.
  4. Principles of Nuclear Magnetism Abraham, A.
  5. Nuclear Magnetic Resonance Spectroscopy Bovey, F.A.;Jelinski, L.;Mirau, P.A.
  6. Phys. Rev. v.131 Hubbard, P.S.
  7. Prog. In NMR Spectrosc. v.12 Vold, R.L.;Vold, R.R.
  8. Adv. Magn. Reson. v.9 Werbelow, L.G.;Grant, D.M.
  9. Prog. In NMR Spectrosc. v.12 Canet, D.
  10. Bull. Korean Chem. Soc. v.12 Lee, J.W.;Lim, M.H.;Rho, J.R.
  11. J. Chem, Phys. v.51 Hubbard, P.S.
  12. J. Chem. Phys. v.93 Bull, T.E.
  13. J. Magn. Reson. v.31 Haslinger, E.;Lynden-Bell, R.M.
  14. J. Chem. Phys. v.65 Matson, G.B.
  15. J. Phys. Chem. v.94 Konrat, R.;Sterk, H.
  16. J. Magn. Reson. Ser. A. v.103 Aheng, Z.;Mayne, C.L.;Grant, D.M.
  17. J. Chem. Phys. v.63 Werbelow, L.G.;Grant, D.M.
  18. J. Magn. Reson. v.92 Kontaxis, G.;Muller, N.;Sterk, H.
  19. Chem. Rev. v.91 Grant, D.M.;Mayne, C.L.;Liu, F.;Xiang, T.X.
  20. Ph, D. Thesis., S.N.U. A Study on Spin Dynamics in an $AX_3$ Spin System Rho, J.R.
  21. J. Chem. Phys. v.83 Konigsberger, E.;Sterk, H.
  22. User Programming Manual VNMR Software
  23. Data Reduction and Error Analysis for the Physical Sciences Bevington, P.R.
  24. Numerical Recipes-The Art of Scientific Computing Press, W.H.;Flannery, B.P.;Teukolsy, S.A.;Vetterling, W.T.
  25. J. Chem. Phys. v.63 Werbelow, L.G.;Grant, D.M.