Direct Observation of Methyl Librations in Neopentane
- 29 April 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 20 (18) , 983-986
- https://doi.org/10.1103/physrevlett.20.983
Abstract
The "small-" method of neutron molecular spectroscopy has been used to observe for the first time the two librational modes, and , of the methyl groups in neopentane. Two inelastic-scattering peaks corresponding to librational modes were measured at 26 and 33 meV, the separation resulting primarily from a difference in the six-fold energy barriers governing the two rotations. Both librational motions were restricted by a dominant threefold energy barrier of +870±30 MeV.
Keywords
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