R. Radeglia et al., ON THE STRUCTURAL ANALYTICAL APPLICATION OF ANOMALOUS MULTIPLETS IN OFF-RESONANCE DECOUPLED C-13 NMR-SPECTRA OF -CH=CH-FRAGMENTS, Journal fur praktische Chemie, Chemiker-Zeitung, 335(8), 1993, pp. 673-679
The theoretical background of ''anomalous'' splitting of signals of mo
lcular fragments -CH=CH- in off-resonance decoupled C-13 NMR spectra i
s described. The use of these splitting phenomena on the determination
of vicinal H,H and geminal C,H coupling constants is demonstrated usi
ng simple examples. The possibilities to determine the configuration o
f double bonds are shown by other examples from the field of natural c
onstituents chemistry.