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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Walker, Stanley Gourlay, Douglas L. Desando, Michael A. |
| Copyright Year | 1983 |
| Abstract | Radiofrequency (102–105 Hz), variable temperature (77–333 K) dielectric loss measurements were performed for a series of diaryl ketones and pyridyl ethylenes in polystyrene, and in the case of benzophenone and 2,3,4,5,6-pentadeuterobenzophenone also in o-terphenyl and in Santovac {bis[m(m-phenoxy phenoxy)phenyl]ether}. An intramolecular process with a low enthalpy of activation (ΔHE≈ 20 kJ mol–1) was observed in the benzophenones and ΔHE≈ 30 kJ mol–1 for bis(2-pyridyl) ketone and 1,2-bis(2- and 4-pyridyl) ethylene. A mesomeric process would seem to be the most probable intramolecular mechanism through which these symmetrically substituted ketone and ethylene derivatives relax. The observed relaxation processes seem to be unaffected by varying the medium. |
| Starting Page | 559 |
| Ending Page | 570 |
| Page Count | 12 |
| File Format | |
| ISSN | 03009238 |
| Volume Number | 79 |
| Issue Number | 4 |
| Journal | Journal of the Chemical Society, Faraday Transactions 2 |
| DOI | 10.1039/F29837900559 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Santovac Ether Enthalpy Ethylene Phenyl group Dielectric Polystyrene Ketone Benzophenone |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry |
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