Spectroscopic studies on the proton transfer reactions of 4-hydroxy-2-oxo-1,2-dihydroquinolin-3-carbonitrile with different amines in acetonitrile
作者:Reem M. Alghanmi、Ramadan A. Mekheimer、Moustafa M. Habeeb
DOI:10.1016/j.molliq.2011.12.013
日期:2012.3
Proton transfer reactions between 4-hydroxy-2-oxo-1,2-dihydroquinolin-3-carbonitrile (HQC) and propylamine (PA), triethylamine (TEA) and piperidine (Pip) have been studied spectro-photometrically in acetonitrile as a polar solvent. The molecular compositions of the formed complexes (I, II, and III) were determined using Job's and photometric titration methods. Minimum–maximum absorbances' method has
在乙腈中以分光光度法研究了4-羟基-2-氧-1,2-二氢喹啉-3-甲腈(HQC)与丙胺(PA),三乙胺(TEA)和哌啶(Pip)之间的质子转移反应溶剂。使用乔布氏和光度滴定法确定形成的复合物(I,II和III)的分子组成。最小-最大吸光度法已用于估算形成的络合物的形成常数(K PT)。已经发现,HQC-TEA复合物的K PT比PA和Pip的K PT更高。基于PT反应的快速性,提出了一种简单,准确的分光光度法测定HQC的方法。在0.19至18.60μgmL − 1的浓度范围内遵守比尔定律具有出色的相关系数。回收率范围为99.63至99.99%。合成了固体配合物,并使用红外光谱,核磁共振谱和元素分析对其进行了表征。