| Autor: |
Sergeev, V. A., Ovchinnikov, Yu. É., Nedel'kin, V. I., Astankov, A. V., Andrianova, O. B., Shklover, V. E., Zamaev, I. A., Struchkov, Yu. T. |
| Zdroj: |
Russian Chemical Bulletin; July 1988, Vol. 37 Issue: 7 p1440-1444, 5p |
| Abstrakt: |
1.Using a fractional extraction method, a macrocyclic trimer, cyclotris(m-phenylenesulfide), has been isolated from poly-m-phenylenesulfide and characterized.2.Conformational rigidity of molecules of cyclotris(m-phenylenesulfide), in the presence of an insubstantial degree of strain for the macrocycle, has been established by x-ray structural analysis. The relatively low yields of larger macrocycles in the polycondensation reaction can be attributed to a greater degree of strain in these molecules, i.e., to larger energies of formation. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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