Ab Initio Calculations of of Spin - Spin Coupling Constants in Anhydrodeoxythymidines
Autoři | |
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Rok publikování | 2000 |
Druh | Článek v odborném periodiku |
Časopis / Zdroj | Journal of Physical Chemistry A |
Fakulta / Pracoviště MU | |
Citace | |
Obor | Fyzikální chemie a teoretická chemie |
Popis | For relatively large organic molecules (containing 16 non-hydrogen atoms each), anhy-drodeoxythymidines, three- ( 3JHH), two- ( 2JHH) 1H - 1H and one-bond 1H - 13C (1JCH) spin - spin coupling constants (J-couplings) were determined both experimentally and theoretically using NMR spectroscopy and density functional theory (DFT). A very good agreement between DFT-predicted and measured values was obtained for 3JHH (rmsd 0.4 Hz). 2JHH and 1JCH were underes-timated relative to the experiment. For all J-couplings investigated, non-contact contributions were negligible or canceled each other out. In general, the level of agreement between DFT and experiment is very promising. |
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