✦ LIBER ✦

1H1H and 1H19F coupling constants of some styrene, benzaldehyde and benzylidene amine derivatives

✍ Scribed by Sirpa Suntioinen; Reino Laatikainen; Vladimir Král

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 372 KB
Volume: 32
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260320111

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✦ Synopsis

Abstract

Five para‐fluorobenzene derivatives having a CHCR~2~ or a CHNR group were prepared and their ^1^H and ^19^F NMR spectra in acetone‐d~6~ were analysed. The ^6^J(H~α~,F) and ^4^J(H^α^,H) couplings of the nitrogen derivatives fall between those of the carbon and oxygen derivatives: the electronegativity of the side‐chain β‐atom seems to have a prominent role in the spin information transmission. The ^6^J(H^α^,F) and ^4^(H^α^,H) couplings indicate that the nitrogen derivatives are rigidly planar whereas the carbon derivatives are non‐planar.

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