芳香環状異項環の分極 第134報

ChinolinおよびIsochinolinのモノニトロ置換体およびハロゲン化Chinolin類の紫外部吸収スペクトル

抄録

Ultraviolet spectra of mononitroquinolines in ethanol solution, as indicated in Fig. 1, exhibit only one absorption maximum in α-nitroquinolines, while two maxima are present in those of β-nitroquinolines. This differentiation was found to be present in mononitroisoquinolines, too, as indicated in Fig. 2. On the other hand, comparison of ultraviolet spectra of various haloquinolines with that of quinoline, as indicated in Fig. 3, shows that haloquinolines exhibit similar absorption as that of quinoline, irrespective of the number of halogens substituted in the ring, with a shift of the two absorption maxima (A and B) in the longer wave-length region by 3-6mμ to a longer wave-length region according to the number of halogens but there is no marked difference in the absorption due to position of the halogens substituted.