« Logic Puzzle #10: Deciphering the Fragment Pattern using 2D NMR Data | Main | Blog on Hiatus from December 13 to January 3 »

December 07, 2010


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There is something I do not understand. Why are there 2 CHs coupled and 2 other CHs uncoupled?


Hello Adolfo,

Thank you for asking good questions. I really appreciate our discussions on the elucidation process.

If I understand you correctly, the puzzle does not report all the 1H-13C correlations, for example the CH-CH fragment. This was done intentionally in an attempt to mimic a realistic interpretation of an experimental HMBC. It is quite common to have HMBC data with missing or poorly resolved correlations.



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