Orgo 2 exam 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Chemical Shift | Difference (ppm) between the resonance frequency of the proton being absorbed and that of TMS
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| Down Field | Lower value of the applied magnetic field, toward the left on the NMR spectrum, the more DESHEILDED a nucleus is, the farther down field it absorbs
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| Upfield | Higher value, toward the right, more sheiled a nucleus is, the farther upfield it absorbs
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| Complex splitting | Splitting by 2 or more different kinds of protons w/ different coupling constants
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| Integration | measurement of the area under a peak, proportional to the # of protons giving rise to that peak
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| Multiplet | group of peaks resulting from the spin-spin splitting of the signal from a single type of nucleus
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| Desheilded | Bonded to a group that withdraws part of the electron density from around the nucleus
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| Sheilded | Surrounded by electrons whose induced magnetic field opposes the externally applied magnetic field
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| TMS | Tetramethylsaline, an NMR standard absorption...0.00
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| MRI | Medical term for NMR, avoiding the term nuclear. Use of field gradients in a large bore magnet to scan 2-D slices of the patient's body
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