Reinvestigation of the substituent effec
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Ludger Ernst; Kerstin Ibrom
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Article
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1999
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John Wiley and Sons
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English
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Introduction of a fluorine substituent into an aromatic ring of [2.2]paracyclophane causes distinct shielding and deshielding effects at the anti -and syn-protons, respectively, of the adjacent bridge methylene group. A recent contradictory claim in the literature was disproved by 2D H,H-NOESY, long