4.3) Consider the mass spectrum of 3-pentanone shown and answer the question below: relative abundance 29 10 20 30 40 50 60 a) Draw the structure of a fragment at m/z 57. 57 c) Draw the structure of a fragment at m/z 29. 70 86 80 miz b) Propose a fragmentation mechanism for the formation of an ion at m/z 57.

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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.