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« What is the ring count for the structure Cubane? | Main | Structural bias in an elucidation »

March 31, 2008


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Glenn Facey


It seems that the CDCl3 resonance shows up in the HMBC F1 sum you have presented. Why is this? There are neither any protons nor any long range proton carbon coupling in CDCl3. Is there a resonance under the CDCl3?



Good eye Glenn. There is a resonance at 77.6 ppm for strychnine (CH-O). Although not clearly evident in the 13C NMR spectrum, there is a slight shoulder peak off the CDCl3 resonance.

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