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Cabocation NMR

The OH of 3-cyclohexenol can be removed using superacid:


The NMR of the cation can be recorded, at -80°:


The central 141.9 ppm carbon is typical of a double bond.

The 224.4 ppms are highly deshielded, but not as much as a localized carbocation, which would be around 330 ppm:

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