Structures of pentamer of tetrafluoroethylene and its derivatives

Abstract

The reactions of the pentamer of tetrafluoroethylene were studied and its derivatives containing vinyl fluoride obtained. F-19 NMR of the comcompounds shows two identical CF2 peaks, whereas pound I gives only one CF2 peak. By comparing these two species, we suggest that the compact perfluoro-ter-hexyl group has a special arrangement. Two perfluoroethyl groups in compounds III (E), VI (E) are located on the front side of the vinyl fluoride, and the perfluoromethyl gruop is located on the back side. It seems that in compound III (E), VI(E) there exists a space interaction between the vinyl fluoride and CF2 groups at an interval of five bonds.

Key words: NMR SPECTROMETRY, CHEMICAL SHIFT, TETRAFLUORO ETHYLENE, OLIGOMER, FLUORINE ISOTOPES

CLC Number:

O627

Cite this article

LIN YONGDA;LIANG YUDA. Structures of pentamer of tetrafluoroethylene and its derivatives[J]. Chin. J. Org. Chem., 1983, 3(2): 97-100.

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