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 …showed first 75 words of 762 total…

…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.