Abstract
IR spectra are reported for
, in which X represents various polar substituents and Y a bridge with multiple bonds. There is a linear relation between the frequency of the vE C-F(H) degenerate vibration and Taft's induction constant σ* for the radical attached to the CF3 group. Frequency vE C-F is also correlated with the σn, which shows that the conjugated system can transmit the electron effect of X to the CF3 group. Compounds are compared as regards this transmission, and some features of the frequencies of the multiple bonds are elucidated.
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See[6, 7] for brief details of the spectra of some of the compounds.
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Kulik, V.F., Egorov, Y.P., Panteleimonov, A.G. et al. Electron interactions and infrared spectra of para isomers of X(CF3Y)C6H4 compounds. Theor Exp Chem 1, 107–112 (1965). https://doi.org/10.1007/BF00945568
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DOI: https://doi.org/10.1007/BF00945568