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The shielding parameters of benz‐X‐azolyl substituents in various positions of the pyridine nucleus were determined by means of a regression analysis procedure. Analogously the shielding contributions of pyridyl substituents on homocyclic protons of benz‐X‐azoles were derived. The results evidence some interactions between the two heterocyclic systems when the benz‐X‐azolyl substituents are linked at the pyridine α‐position.
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Carpignano et al. (1984) studied this question.
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