Please analyze the NMR spectras below and clearly label each peaks, compare them and determine if...

Question

Please analyze the NMR spectras below and clearly label each peaks, compare them and determine if there's any contamination.

This is the reaction:

OH EtoH H* OEt +HO pyr

Standard Benzaldehyde NMR:

12 0 987 6 543 20-1-2 fl (ppm) iHNMR (43 MH)δ 1001 (s, lID,831-705(m5H).

Cinnamic acid NMR:

㎐ IH), 2.18(s, 5H). 12 10 98 7 6 543 20-12 fl (ppm) 12 iH NMR(43 MHz, ) δ 788-7.04 (m, lH), 7.46 (s.2H), 645 (d,J- 16.0 Hz,IH

Ethyl cinnamate NMR:

4. I 7 (dd, J= 7.4, 6.6 Hz, 2H), 236-0 644缃, T 12 10 6 4 fl (ppm) iH NMR (43 M㎐ ) δ 8. I 1-6.99 (m, 5H), 639 (d,J=16.0 ㎐IH),

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Answer #1

3시 l t

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