Question 13 (6 points) a) Proton NMR spec can be used to obtain information about the structure of molecules. State the information that can be obtained from the (2 marks) i) number of peaks ii) ratio of peak area iii) chemical shift b) A proton NMR spec for a compound with a chemical formula C4H2O2, displays three major peaks with chemical shifts, areas and splitting patterns given in the table below. peak area chemical shift / ppm 0.9 3 splitting pattern triplet quartet singlet 2.0 2 4.1 3 With the table 27 in the Data Booklet and the information above, determine the types of proton present in the molecule. [2 marks] c) Deduce a structure consistent with the information in a) and b). [2 marks]