Chemistry, 22.03.2021 18:10 allenpaietonp9v8sv
3) Which doublet peaks in the H-NMR spectrum of curcumin correspond to the trans-alkene protons? Hint: trans-alkene protons have 15-17 Hz coupling constants. For example, the coupling constant for the doublet at 6.836 ppm is calculated as follows: (6.836 – 6.815)ppm · 400 MHz = 8.4 Hz. Therefore, this doublet is NOT a trans-alkene proton.
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3) Which doublet peaks in the H-NMR spectrum of curcumin correspond to the trans-alkene protons? Hin...
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