Solution phase, solid state and computational structural studies of the 2-aryl-3-bromoquinolin-4(1H)-one derivatives1
作者:Malose J. Mphahlele、Manuel A. Fernandes、Ahmed M. El-Nahas、Henrik Ottosson、Stephen M. Ndlovu、Happy M. Sithole、Bongumusa S. Dladla、Danita De Waal
DOI:10.1039/b206657b
日期:2002.12.6
The structures of the potentially tautomeric 2-aryl-3-bromoquinolin-4(1H)-ones were studied using spectroscopic (NMR, IR and mass), X-ray crystallographic and computational techniques. These systems are found to exist in solution (1H NMR and 13C NMR) and solid state (IR and X-ray) as the NH-4-oxo derivatives, and their carbonyl nature is also corroborated by comparison of their spectroscopic data with those of the corresponding N-methylated and O-methylated derivatives. The presence of the quinolinol (hydroxyquinoline) isomer in the gas phase is confirmed by low and high resolution mass spectrometry.
利用光谱学(核磁共振、红外光谱和质谱)、X射线晶体学和计算技术研究了可能发生互变的2-芳基-3-溴喹啉-4(1H)-酮的结构。发现这些系统在溶液(1H NMR和13C NMR)和固态(IR和X射线)中以NH-4-氧代衍生物的形式存在,并且通过将其光谱数据与相应的N-甲基化和O-甲基化衍生物进行比较,也证实了它们的羰基性质。通过低分辨率和高分辨率质谱法证实了气相中喹啉醇(羟基喹啉)异构体的存在。