Question
In addition to a signal downfield, the $^{1}$ H NMR spectrum of trans-15,16-dimethyldihydropyrene has a signal far upfield at $\delta-4.2 .$ Account for the presence of this upfield signal.
Step 1
2$. This is unusual as most proton signals in NMR spectroscopy are found downfield, closer to 0. Show more…
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