Solvent effect on the 19F NMR chemical shifts of fluoroalkyl halides

Abstract

The interaction between fluoroalkyl halides and solvents results in the variation of 19F NMR chem. shifts of Cl(CF2)4R (R = Br, I). A linear relationship between the variation of chem. shifts and the donor no. (DN) of various solvents has been found.AA. When Et3N-HMPA was used as the solvent, DdF increased first with increasing solvent concentration, and then began to level off when the mole ratio of the solvent to fluoroalkyl halide reached 2:1.

Key words: CONCENTRATION, SOLVENT EFFECT, HALOHYDROCARBON, HALOHYDROCARBON, CHEMICAL SHIFT, FLUOROHYDROCARBON, F19 NMR SPECTROMETRY, HALOTHANE P

CLC Number:

O621.16

Cite this article

CHEN QINGYUN;HE YABO;YANG ZHENYU. Solvent effect on the 19F NMR chemical shifts of fluoroalkyl halides[J]. Chin. J. Org. Chem., 1988, 8(5): 451-453.

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