ISSN:
0570-0833
Keywords:
Oligophenyls
;
Oligophenylenes
;
Polyphenyls
;
Heat resistance
;
Materials science
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The classical and modern syntheses of oligophenyls and polyphenyls are compared to illustrate the value and the range of applications of the preparation methods described. The investigations showed a relationship between the number, arrangement, and substitution of the aromatic rings and the physical properties of the products. The melting point of the p-polyphenyls rises with increasing degree of condensation. Methylation, and linkage in the m-positions lowers the melting point and at the same time improves the solubility. o-Oligophenyls melt at lower temperatures than the p-isomers. The highest-melting substance in this class in p-septiphenyl, which melts at 545 °C.
Additional Material:
6 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/anie.196808351
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