Substituent Effects. IX. 1 H and 19F Nuclear Magnetic Resonance Spectra of 4-Substituted 3, 5-Dimethylfluorobenzenes2

MJS Dewar, Y Takeuchi

文献索引：Dewar,M.J.S.; Takeuchi,Y. Journal of the American Chemical Society, 1967 , vol. 89, # 2 p. 390 - 394

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被引用次数: 25

摘要

Abstract: 19F chemical shifts are reported for a series of 4-substituted 3, 5- dimethylfluorobenzenes (I); comparison of these values with ones for para-substituted fluorobenzenes show differences that can be attributed to steric hindrance of mesomerism. Combined with the arguments of part VII, 4 these results suggest that the r-inductive effect is not important, A polarization being mainly due to mesomeric interactions. The proton nmr ...