Molecular Rotation and Translation in Crystals. Nuclear Magnetic Resonance Absorption, Heat Capacity, and Entropy of Crystalline Solid Solutions of 2,2-Dimethylbutane in 2,3-Dimethylbutane from 10°K to 273°K
- 1 May 1956
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 24 (5), 1061-1066
- https://doi.org/10.1063/1.1742677
Abstract
The nuclear magnetic resonance absorption of solid solutions of 2,2‐dimethylbutane (A) and 2,3‐dimethylbutane (B) has been studied as a function of composition. The melting range is clearly marked, but the rotational transition is absent. There is a maximum in the melting point diagram at the composition B2 A3. Thermal data have been determined on this complex from 10°K to 265°K from which the zero‐point entropy has been deduced. The heat capacity curve and zero‐point entropy of the crystals are those of a glass which indicates translational freedom in the rotating crystals.Keywords
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