A compound has the following 13C signals. The DEPT-135 and DEPT-90 spectral data is provided below. Signal A B C D E F 1 Carbon signals (ppm) 28.2 Compound X 2 Using the information provided select the best structure that matches the DATA and assign the peaks accordingly: 5 29.3 45.7 62.9 108.9 136.9 4 3 DEPT-135 Positive Compound B 0 6 4 Q 5 2 3 No peak Negative Negative Positive Positive Compound S 6 DEPT-90 No peak No peak No peak No peak Positive Positive 5

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NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.