Molecular motion in solid diamantane studied by nuclear magnetic resonance
- 1 January 1978
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 74, 1767-1777
- https://doi.org/10.1039/f29787401767
Abstract
N.m.r. measurements of proton relaxation times and second moments for solid diamantane have been made from 100 K to its melting point at 518 K. The upper temperature phase, from 442.5 to 518 K, was found to be a plastic phase exhibiting rapid molecular reorientational motion and translational motion with an activation enthalpy of 99.7 ± 1.6 kJ mol–1. The lower temperature phases are non-plastic and the molecules undergo anisotropic reorientational motion. The measured values of the activation enthalpies are compared with previously predicted theoretical values.Keywords
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