Infrared C–D Stretching and<sup>2</sup>H NMR Spectra of Isopropyl-2-<i>d</i>1-(<i>p</i>-Substituted Phenyl)ethyl Ketones. Evidence for the Hydrogen Bond-Like Interaction between C–D Group and Aromatic π-Electrons
作者:Makoto Karatsu、Hiroko Suezawa、Kazuhisa Abe、Minoru Hirota、Motohiro Nishio
DOI:10.1246/bcsj.59.3529
日期:1986.11
Isopropyl-2-d 1-(p-X-phenyl)ethyl ketones (where, X=H, NO2, Br, Cl, C2H5, CH3, and NH2) were shown to have two absorption bands in the C–D stretching region. The absorption band at the higher frequency (ca. 2177 cm−1) is assigned to the C–D···π approached conformer, and the high frequency shift is ascribed to the effect of steric compression. Weak C–D···π hydrogen bond was shown to occur by the measurement
异丙基-2-d 1-(pX-苯基)乙基酮(其中,X=H、NO2、Br、Cl、C2H5、CH3 和 NH2)在 C-D 拉伸区域有两个吸收带。较高频率(约 2177 cm-1)的吸收带被分配给 C–D…π 接近的构象异构体,高频位移归因于空间压缩的影响。通过测量取代基对形成常数和C-D...π接近构象异构体的相对焓的影响,表明存在弱C-D...π氢键。