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H NMR spectrum of the product (1,5-diphenyl-1-4-pentadien-3-one). The protons that are alpha to the aromatic ring...

H NMR spectrum of the product (1,5-diphenyl-1-4-pentadien-3-one). The protons that are alpha to the aromatic ring (beta to the carbonyl group) have the highest chemical shift at  = 7.71 ppm. Why are these protons more deshielded than the protons of the aromatic ring? Explain using resonance structures.

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