Study of the effects of coupling by NMR spectroscopy 16.1H-1H spin-spin coupling constants in phenyl alkyl ethers
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An analysis of high-resolution NMR spectra in an aromatic fragment of phenyl alkyl ethers within a five-spin system was conducted.
A previous conclusion concerning the steric inhibition of coupling of the 2p electrons of the oxygen atom with theπ system of the aromatic ring in the case of tert-butoxybenzene due to steric perturbation of the p-π coplanarity of the molecule was confirmed.
The general similarity of the mechanism of the change in the constants of the1H-1H in phenyl ethers caused by steric perturbation of coupling in the phenoxy fragment and the competitive effect of the ether oxygen with a second unsaturated substituent was demonstrated.
KeywordsPhenyl Oxygen Atom General Similarity Phenoxy Competitive Effect
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