Einflüsse von substituenten in 6-stellung auf die 13C-chemischen verschiebungen der kohlenstoffatome des purins |
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Authors: | E Breitmaier W Voelter |
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Institution: | Chemisches Institut der Universität, D-7400 Tübingen 1, Auf der Morgenstelle, Germany |
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Abstract: | The 13C chemical shifts of purines substituted in the 6 position are reported. Signals are assigned on the basis of general chemical shift rules and by proton “off-resonance” decoupling. Substituent effects (Z6i) of the substituent X in the 6 position of purine on the 13C chemical shifts of purine ring carbon atoms are determined. A linear correlation exists between the substituent effects of X on C-6 (Z66) and Pauling's electronegativity values Ex of the substituent X. |
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