There are four structural isomers that are alcohols with the formula C4H9OH. (a) The numbers of peaks, and the areas under them, in the 1H NMR spectra of these alcohols can be used to identify them. i. Explain why the 1H NMR spectrum of (CH3)2CHCH2OH has four peaks. Predict the ratio of the areas under the peaks.  ii. Deduce the structure of the alcohol whose 1H NMR spectrum has two peaks with areas in the ratio 9:1.

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