Abstract
17O, 1H spin-spin coupling constants in systems with intramolecular hydrogen bonds are reported. The 17O NMR spectra, proton decoupling and the special DECOMPOSITION program were used. In asymmetrical systems, 17O, 1H coupling constants of about 80 Hz were found for one of the oxygen nuclei while for symmetrical systems 17O, 1H coupling constants of about 30 Hz were observed for both equivalent oxygen nuclei. The data on 17O, 1H coupling constants can be used to estimate the state of the proton in the hydrogen bond.
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