muhali3 Posted June 1, 2010 Share Posted June 1, 2010 In the picture, will carbon 4 or carbon 6 appear more downfield on a C13 NMR spectrum. They are both one carbon away from a nitrogen, I am guessing 4 but I have no logical reason for this answer. Thanks for the help Link to comment Share on other sites More sharing options...
Tartaglia Posted June 2, 2010 Share Posted June 2, 2010 They are going to be very close frankly. Link to comment Share on other sites More sharing options...
louis wu Posted June 2, 2010 Share Posted June 2, 2010 No 4 should in theory be more downfield as it has 2x N at 2 atoms removed. No 2 has 1x N at 2 atoms removed. The difference is unlikely to large as these are not primary factors in fieldshift. Link to comment Share on other sites More sharing options...
Geo Posted June 3, 2010 Share Posted June 3, 2010 (edited) Four, count the groups which the carbons are connected to. Edited June 3, 2010 by Geo Link to comment Share on other sites More sharing options...
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