NMR
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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…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.
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