The solid phases of cyclooctanone studied by thermal, nuclear magnetic resonance, and dielectric techniques

JOURNAL OF PHYSICAL CHEMISTRY(1993)

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摘要
Differential thermal analysis has been used to reexamine the stable and metastable solid phases of cyclooctanone and the phase transitions. NMR and dielectric measurements were used to characterize the extent of molecular motions in each phase. Rotor phase I can be supercooled into a glassy crystal, I(g). A single orientationally ordered phase, II, is stable at low temperatures. Another phase, II', is always metastable with respect to phase II. The activation energies of self-diffusion and molecular reorientation in I are reported.
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nuclear magnetic resonance
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