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1 H 1 H and 1 H 19 F coupling constants of some styrene, benzaldehyde and benzylidene amine derivatives
Author(s) -
Suntioinen Sirpa,
Laatikainen Reino,
Král Vladimir
Publication year - 1994
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260320111
Subject(s) - chemistry , benzaldehyde , fluorobenzene , electronegativity , medicinal chemistry , styrene , nmr spectra database , nitrogen , coupling constant , spectral line , organic chemistry , catalysis , polymer , physics , particle physics , astronomy , copolymer , benzene
Five para ‐fluorobenzene derivatives having a CHCR 2 or a CHNR 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.