Title: Nuclear Magnetic Resonance Instrument: JEOL 270 MHZ Nuclear Magnetic Resonance Spectrometer CHEM 4604 Nuclear magnetic resonance is a phenomenon, which occurs when the nuclei of certain atoms are immersed in a static magnetic field and exposed to a second oscillating magnetic field. Some nuclei experience this phenomenon, and others do not, dependent upon whether they possess a property called spin. Most of the matter you can examine with NMR is composed of molecules. Molecules are composed …
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showed last 75 words of 762 total
…Assign. Shift (ppm) for H NMR A *1 4.322 B *1 4.069 C 3.796 D *2 2.530 E *2 2.513 F 1.287 The proton NMR has three sets of peaks; a singlet at 7.7305 (2H), a messy doublet at around 2.7036 (4H), and a singlet at 2.5965 (3H). The singlet at 2.5 is consistent with an isolated CH3 adjacent to a mildly electronegative center. consistent with a CH2 group adjacent to two mildly electronegative centers (X-CH2-Y). Analysis for C NMR Ppm Int. Assign. For C NMR 216.16 104 1 76.13 760 2 64.14 981 3 36.49 1000 4 15.55 951 5 15.56 2-methyltetrahydro-3-furanone.