Phenylated polyquinoxalines from 1,4-BIS(phenylglyoxaloyl)benzene
✍ Scribed by Wrasidlo, W. ;Augl, J. M.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1969
- Tongue
- English
- Weight
- 154 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0449-2986
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📜 SIMILAR VOLUMES
Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.002 A Ê R factor = 0.045 wR factor = 0.131 Data-to-parameter ratio = 20.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
High molecular weight poly(phenylenebenzobisoxazole) (PBO) was synthesized from 1,3-diamino-4,6-dihydroxybenzene dihydrochloride ( 1) and 1,4-bis(trichloromethyl)benzene ( 3) in polyphosphoric acid (PPA) or a mixture of PPA and methanesulfonic acid. When PPA was used as the solvent, 3 was first conv
The title compound, C 24 H 18 , possesses a twofold rotation axis, which bisects the 1,2-dimethylbenzene ring. In the crystal structure, all three benzene rings are essentially coplanar, the angle between the central and terminal rings being 3.8 (1) .
The molecules of the title compound, C 20 H 18 O 6 S 2 , lie across centres of inversion. The dihedral angle between the central and terminal benzene rings is 54.92 (9) .