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NMR Spectra of Benzenes Containing Trifluoromethyl Groups

1985; Oxford University Press; Volume: 58; Issue: 2 Linguagem: Inglês

10.1246/bcsj.58.755

1348-0634

Kensuke Takahashi, Akihiro Yoshino, Kenzo Hosokawa, Hiroshige Muramatsu,

Synthesis and Reactions of Organic Compounds

Abstract The 1H, 13C, and 19F NMR spectra of the nine title compounds were measured. The substituent effect of a trifluoromethyl group were generally additive for the 1H, 13C, and 19F chemical shifts. The assignment of the 13C signals was assisted by the observed coupling constants between the carbon and the fluorine, which were about 275, 35, and 6 Hz for the 1J, 2J, and 3J values of these compounds.