Role of substituents in copper(<scp>II</scp>) extraction with N,N′-bis(8-quinolyl)malonamides
作者:Takuji Hirose、Kazuhisa Hiratani、Kazuyuki Kasuga、Kiyoshi Saito、Tohru Koike、Eiichi Kimura、Yoshinobu Nagawa、Hiroshi Nakanishi
DOI:10.1039/dt9920002679
日期:——
It has been found that substituents on N,N'-bis(8-quinolyl)malonamide play an important role in copper(II) extraction: among the substituents studied, benzyl groups dramatically increased extractability of the malonamide complex. The role of substituents is discussed on the basis of the results of titration and H-1 NMR measurements of copper(II) or nickel(II) complexes as well as copper(II)-extraction experiments. Intramolecular interactions between pi electrons of the benzyl group and the metal centre of the complex are proposed to occur.