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3. Determine the coupling constants for ethyl acrylate, show your work. Draw tree diagrams for each of the five protons. Assign the protons to the structure shown using the letters a, b, c, d and e. The chemical shifts of each protons are given in Hertz above the peaks in the expansions.(13pts) 1.302 Н. HH H 6.5 5.5 4.5 3.5 5 2.5 1.5 bbm
1.302 4.226 1.326 SZ 4.250 4 3.5 25 1.5 ppm
6.4 6,405 6.396 6.349 6.340 6:3 6.2 ppm -6.172 6.140 6.116 6.1 6.084 5.9 5.831 5.822 5.8 5.799 5.789 5.7