一些长链全氟烷基化合物的^(19)F NMR化学位移

^(19)F NMR Chemical Shifts of Some Long Chain Perfluoroalkyl Compounds

长链全氟烷基化合物的^(19)F NMR化学位移已有很多报道,然而,文献报道的大多是CF_3-(CF_2)_n-X化合物,对于X-(CF_2)_n-Y化合物报道相对较少。长链全氟烷基化合物的^(19)F NMR谱的归属是较困难的,特别是对于X-(CF_2)_n-Y的化合物的谱,由于两端取代基的效应,图谱归属更困难。本文报道一些未报道过的长链全氟烷基化合物的^(19)F NMR化学位移的数据,并讨论它们的归属。

^(19)F NMR Chemical Shifts of a series of compounds X-(CF_2)_n-Y[X(orY) = (CF_3)_2-CF, I, SO_2Cl, H, C(CH_3)_2 OH, SO_3F etc.] are reported. The effects of substituent groupsand chain length are discussed.