Magnetic shielding of acetylenic protons in ethynylarenes

Y Okamoto, KL Chellappa…

文献索引：Okamoto,Y. et al. Journal of Organic Chemistry, 1972 , vol. 37, p. 3185 - 3187

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被引用次数: 10

摘要

In the case of the methyl polyyne system, the spectra of the acetylenic protons are not affected by the chain length. However, aromatic polyynes show large diff erences in chemical shifts between mono-and diynes, whereas the chemical shift for the proton beyond diyne remains constant within experimental error. These observations support the explanation that the counter-