Which of structure is consistent with this H-NMR spectrum? The answer is A, but

Question

Which of structure is consistent with this H-NMR spectrum?

The answer is A, but I don't know why.  I'm confused because there are only singlets on the spectrum above, and I would have thought that the hydrogens on the rings would produce doublets or triplets.

Which of structure is consistent with this H-NMR spectrum? The answer is A, but I don't know why. I'm confused because there are only singlets on the spectrum above, and I would have thought that the hydrogens on the rings would produce doublets or triplets.

Explanation / Answer

The signal around 7-8 ppm belong to the aromatic ring (note that you can disscard the option D because the p-disubstituted pattern doesn

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