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Photodimers of cinnamic acid and related compounds. A stereochemical study by NMR

✍ Scribed by G. Montaudo; S. Caccamese; V. Librando

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
221 KB
Volume
6
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^1^H NMR spectra of photodimers of cinnamic acid, chalcone and related compounds were analysed, and the spectral parameters and all the coupling constants were obtained. A clear differentiation among the head‐to‐head and head‐to‐tail stereoisomers can be obtained by considering the values of K, L, M and N parameters. The different types of hh and ht isomers can be immediately assigned by considering the relative values of the three‐bond couplings. An authentic example of an A~2~B~2~ spin system is reported.

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