Question

3) a) (2 points) Label the 1H NMR spectrum of adipic acid by identifying key resonances. Use letters (a, b, c, etc.) to match Hs in the product with peaks on the spectrum. b) (2 points) Label the 13C NMR spectrum of adipic acid by identifying key resonances. Use numbers (1, 2, 3, etc.) to match Cs in the product with peaks on the spectrum. (Hint: The deuterated dimethyl sulfoxide or DMSO, (CD3)2S

Answer 1

Answer:

The label of spectrum is attached.

Explanation:

adipic acid is equal to:

COOH - CH2 - CH2 - CH2 - CH2 - COOH

(1)            (2)      (3)       (3)       (2)       (1)

The structure of adipic acid indicates that it has 3 equivalent carbons, therefore it should have 3 peaks in the spectrum:

The first peak at approximately 172 ppm is from carbon (1) COOH. The second peak is at approximately 23 ppm and is by carbon number (3) CH2. and the third peak is at approximately 37 ppm and is due to group number (2) CH2.