Relaxation processes of some aromatic sulfides, sulfoxides, and sulfones in a polystyrene matrix

Article abstract of DOI:10.1063/1.440497

Dielectric absorption studies have been made of a number of aromatic sulfides, sulfoxides, and sulfones in a polystyrene matrix at a variety of temperatures in the frequency range of 10²-10⁵ Hz, and in three cases between 10⁴-10⁷ Hz.One compound, bis (4-pyridyl) sulfide, was also examined as a pure compressed solid in the frequency range of 10⁴-10⁷ Hz.The Eyring parameters have been determined and used to characterize the relaxation processes.Low enthalpies of activation (ca.15 kJ mol^-1) have been estimated for an intramolecular relaxation process of diphenyl, bis (4-tolyl) and bis (4-pyridyl) sulfide, and rotation about the C-S bond in these symmetrical aromatic sulfides would, thus, be expected to occur quite readily.These low barriers are to be contrasted with those for the molecular relaxation values of 60-78 kJ mol^-1 for diphenyl, bis(4-tolyl) and bis(4-chlorophenyl) sulfoxides and sulfones.The enthalpies of activation (ca.39 kJ mol^-1) for the molecular relaxation of the disklike molecules, dibenzothiophene and its oxides, are also lower than those for the corresponding nonplanar diphenyl sulfur oxides.

Full text of DOI:10.1063/1.440497

Relaxation processes of some aromatic sulfides, sulfoxides, and sulfones in a
polystyrene matrix
M. A. Desando, S. Walker, and W. H. Baarschers
Citation: The Journal of Chemical Physics 73, 3460 (1980); doi: 10.1063/1.440497
View online: http://dx.doi.org/10.1063/1.440497
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/73/7?ver=pdfcov
Published by the AIP Publishing
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
41.217.58.222 On: Thu, 27 Nov 2014 13:51:38
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
41.217.58.222 On: Thu, 27 Nov 2014 13:51:38
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
41.217.58.222 On: Thu, 27 Nov 2014 13:51:38
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
41.217.58.222 On: Thu, 27 Nov 2014 13:51:38
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
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