Low Temperature Specific Heats: III. Molecular Rotation in Crystalline Primary Normal Amyl Ammonium Chloride
- 1 January 1933
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 1 (1), 95-102
- https://doi.org/10.1063/1.1749225
Abstract
The heat capacity of primary normal amyl ammonium chloride was measu red between 20° and 280°K. If the substance is quenched to 90°K a metastable form is obtained which upon heat ing above 165°K slowly changes toward an apparently st able form. Two regions of gradual transition were found. X-ray powder diffraction photographs taken above and below the transition regions were remarkably similar. The experimental results are interpreted on the basis of rotation of the NH3C5H11+ groups in the crystals.Keywords
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