NMR spectroscopy and X-ray crystallography are two methods that use electromagnetic radiation to examine the structures of large molecules. For each method, state the sub-atomic particle involved, and explain how this particle interacts with the radiation. NMR: X-ray:
The two NMR spectra 1 and 2 were recorded before and after alcohol Y was oxidised to form compound Z. The number of hydrogen atoms responsible for each peak is not shown. Every peak is displayed.
State which spectrum, 1 or 2, was produced by the alcohol, and give a reason for your choice.
The mass spectrum of Y gave an $M : M+1$ peak ratio of $17.6 : 0.6$. Use this together with the other information in the question to identify both Y and Z.
Draw a displayed formula for Y in the box given.
Explain why the NMR spectrum of Z shows only one peak.