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1H, 13C and 17O NMR study of aromatic ring-substituted monochloro- and monobromo-(E)-3-phenylpropenals

✍ Scribed by Erkki Kolehmainen; Katri Laihia; Pia Mänttäri

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
461 KB
Volume
29
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Trans‐Cinnamaldehydes (CAs) or o‐, m‐ and p‐X‐(E)‐3‐phenylpropenals; (X = Cl or Br) were synthesized and their ^1^H, ^13^C and ^17^O NMR spectra were measured, assigned and analysed. The long‐range benzylic couplings are discussed in terms of the conformational characteristics of the related styrene systems. The ^1^H, ^13^C and ^17^O NMR substituent chemical shifts of the CA derivatives were compared with those of styrene and explained by the π‐electron delocalization in the conjugated CCCO bond system of CA.

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