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Methyl tunnelling rotation in the n-alkanes

✍ Scribed by K.J. Abed; S. Clough


Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
284 KB
Volume
142
Category
Article
ISSN
0009-2614

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πŸ“œ SIMILAR VOLUMES


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The frequencies are reported of tunnelling rotation of the terminal methyl groups of n-alkyl chains in polycrystalline samples of ten members of the series n-alkane-2-one. The dependence of the frequency on chain length exhibits a sharp change. Alkyl chains longer than seven carbon atoms have methyl

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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