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Rotational frequencies of methyl group tunneling

✍ Scribed by M.J. Barlow; S. Clough; A.J. Horsewill; M.A. Mohammed

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
458 KB
Volume
1
Category
Article
ISSN
0926-2040

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✦ Synopsis

Methyl tunnel frequencies, measured at 4 K, are found to be 455 +/- 8 kHz in methyl malonamide and 496 +/- 8 kHz in methyl ethyl ketone. The first is unaffected by deuteration of the amide groups. Measurements of the temperature dependence of the spin lattice relaxation time are also reported for methyl malonamide and a further test is made of a previously reported correlation between tunnel frequency and the temperature of the T1 minimum. The measurements are in good agreement with the universal correlation curve.

πŸ“œ SIMILAR VOLUMES

Rotational tunneling of methyl groups in
Rotational tunneling of methyl groups in pentamethylbenzene studied by NMR relaxation resonance
✍ Barbara GabryΕ›; Lieven van Gerven πŸ“‚ Article πŸ“… 1981 πŸ› Elsevier Science 🌐 English βš– 450 KB

NMRRR elperunents, using field cyclin g, on pentamethylbenzene below 15 K yield one Zeeman-tunnel resonance anomaly in the spin-lattice relaxation, at 1.88 T, corresponding to a Larmor frequency equal to half the tunnel frequency, probably of methyl groups, whose reorientation causes the fi\* versus