Explain why the carbon of an ,-unsaturated carbonyl compound absorbs farther downfi eld
Chapter 20, Problem 20.82(choose chapter or problem)
Explain why the carbon of an ,-unsaturated carbonyl compound absorbs farther downfi eld in the 13C NMR spectrum than the carbon, even though the carbon is closer to the electron-withdrawing carbonyl group. For example, the carbon of mesityl oxide absorbs at 150.5 ppm, while the carbon absorbs at 122.5 ppm. O 122.5 ppm 150.5 ppm mesityl oxide
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