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iPad 11:45 AM eleam.mtsu.edu 98% My Home > Organic Chernistry IL- Ravyn Foster Time Limit: 0:40:00 Time Left: 0:27:3Ravyn Foster: Attempe 1 Quiz 2 of 4 questions saved Page 1i Page 2 of 2 Previous Page Next Page Note: tt is recommended that you save your response as you complete each question Page 2: Answer the following questions based on the labeled Carbons on the sbructure and the 13C-NMR Legend Saved Response Unsaved Response Info Item Question 3 (0.5 points) The signal at 129.6 ppm represents which carbons t and D Question 4 (0.5 points) The signal at 26.2 pom represents which carbons? Page 2 of 2 Previous Page Next Page Page 1 Saved Go to Submit Quiz

Explanation / Answer

The signal at the 129.6 ppm corresponds to the double bonded carbons i.e. the A and B carbons marked. This is due to the double bond or the sp2 hybridised carbons.Electronegative atoms and pi bonds cause downfield shifts.

The carbon atom farthest to the carbon atom ie the D carbon correponds to the 26.2 ppm peak.

The A and B , C and E , and D alone are equivalent carbon atoms in the molecule.

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