NMR Problems Problem 5: Determine the correct structure from the provided structures and write this structure in the box provided on the NMR spectrum. Students are provided the 1H and 13C NMR data to use as additional information to solve this problem. \begin{tabular}{|l|l|l|l|} \hline Structure A & Structure B & Structure C & \\ \hline Draw the correct structure \\ in the provided box for \\ full credit. \end{tabular} \begin{tabular}{|l|l|l|c|} \hline & \multicolumn{1}{|c|}{1NMR} & Splitting & Integration \\ \hlineHA & 6.8ppm & Doublet & 6 \\ \hline HB & 6.1ppm & Doublet & 6 \\ \hline HC & 5.9ppm & Singlet & 6 \\ \hlineHD & 3.5ppm & Singlet & 24 \\ \hlineHE & 2.0ppm & Singlet & 18 \\ \hline \end{tabular} \begin{tabular}{|l|l|l|} \hline & \multicolumn{1}{|c|}{ C13 } & \multicolumn{1}{|c|}{ DEPT-135 } \\ \hlineCA & 146ppm & No signal \\ \hlineCB & 145ppm & No signal \\ \hlineCC & 131ppm & Positive \\ \hlineCD & 113ppm & No signal \\ \hlineCE & 106ppm & Positive \\ \hlineCF & 102ppm & Positive \\ \hlineCG & 102ppm & Positive \\ \hline \end{tabular}